They reached the end of the lower deck to find that Mulligan had locked himself in the store room. The Doctor and Lily hung back while Avery banged on the door and yelled, "Come out of there, you mutinous dog!"

The Doctor pushed Avery aside as he began to sonic the lock ('Good thing it's metal,' Lily thought to herself) when they heard a strange song echoing around the ship.

"Is that-?" Lily began, eyes widening, and the Doctor immediately pulled her to him and he began to check her up and down.

"I'm fine, Doctor." Lily reassured, though her own hazel eyes wandered over him anxiously. "Are you?"

"I don't think I'm injured." The Doctor muttered as Avery also checked himself.

"So, who-?" Lily began when a blue-ish green light streamed out from through the gaps in the storeroom door.

"She's inside." The Doctor realized, and Avery murmured, "She's come for Mulligan."

Lily flinched as Mulligan suddenly screamed, before the light and his screams disappeared. The Doctor and Lily exchanged looks and the Doctor darted forward. Quickly sonicing the lock, he opened the door and rushed inside, sonicing around to try and find the source of the Siren's sudden appearance. Lily and Avery looked around in the meantime, and Avery grabbed the crown that Mulligan had had around his wrist, now lying carelessly on the ground.

"There's no water in here." Lily meanwhile said slowly as she looked at the Doctor.

He looked back at her, his brows furrowed in thought, and Lily said slowly, "If there's no water..."

"How did she take him?" Avery asked. "You said she uses water like a door, that's how she enters a room."

Lily saw the Doctor's gaze drop to the crown - the shining metal crown.

"Doctor?" She asked slowly, but he moved to stare at his reflection in the metal of the crown.

"I was wrong." The Doctor murmured. "Please ignore all my theories up to this point."

"What, again?" Avery asked incredulously, but Lily cut in, "Doctor, what is it?"

"We're all in danger." The Doctor said hurriedly as he grabbed the crown from Avery. "The water's not how she's getting in. When we were down in the hold, think what happened. You, me, Amy, Rory, leeches."

"She sprang from the water." Avery shrugged but the Doctor corrected, "Yes, only when it grew still. Still water."

"Nature's mirror." Lily breathed. "She's using reflection."

Avery looked at them in shock while the Doctor stared into space.

"That siren legend." The Doctor muttered. "The curse."

"You said curses weren't real." Avery rebuffed but the Doctor explained quickly, "Folklore springs from truth. She attacks ships filled with treasure. Where else do you get a perfect reflection?"

"Polished metal." Avery realized, catching up to the Doctor and Lily's realization.

The Doctor hurried to shove the crown under a rucksack in the storeroom. Avery was equally alert as he said urgently, "We must warn them."

"Come on, then!" Lily ordered as she ran out ahead, one hand clutching her stomach.

The Doctor was right behind her, grabbing her hand as he ran with her while Avery hurried behind them as they made their way toward the magazine.

The Doctor rushed on ahead as they reached the door so he could pound on it, and he yelled, "Amy! Open the door!"

"Toby!" Avery yelled as he caught up to the couple, his voice filled with worry and fear for his son. "Open the door! Toby!"

"Amy, Rory!" Lily yelled.

"Toby!" Avery shouted, just as the door opened.

"Rory!" Lily gasped in relief as she saw her friend, and he asked in confusion, "What's going on?"

The Doctor however, saw a medallion in Toby's hands and he launched toward the boy, grabbing the trinket and hastily breathing on it to cloud any reflection on the shiny trinket. The others all stared at the Doctor's strange antics, but Avery breathed in relief as the Doctor sent him a thumbs up to let him know they - including his boy - were safe.


"We've got to destroy every reflection." The Doctor urged Avery as he used a mullet to break all the windows in the Captain's quarters. "Gold, silver, glass, she could spring from any of them."

He then destroyed the mirror hanging from the wall, before catching sight of Avery's face.

"Oh, yes, yes, I know, I know." He placated the superstitious pirate captain. "Very bad luck to break it. But look at it this way. There's a stroppy homicidal mermaid trying to kill all."

"How much worse can things get?" Avery sighed, nodding in agreement.

"Yep." The Doctor agreed before he bent down to grab all the gold and treasure that was sitting atop Avery's desk. "Help me lug this lot out."

"Where are we taking it?" Avery asked, frowning, and the Doctor answered, "The ocean."

"No!" Avery balked instantly. "No. This is the treasure of the Mogul of India."

"Oh, good. For a moment there I thought it was yours." The Doctor answered sarcastically.

"Doctor!" Avery grabbed the Doctor's shoulders as the Time Lord moved to grab the gold once more, and he wheedled, "Wait. Must we do this?"

The Doctor stood up and he retorted sharply, "Any reflection, any mirror, and the Siren will attack. We have to protect Rory and Toby. Go and get the crown from the storeroom."

Avery sighed but he did as he was told. The Doctor watched him go grimly before he turned back to Avery's treasure and began chucking all of it out of the broken windows.


"Just wait?" Rory repeated incredulously.

They were all gathered once more in the magazine, Amy sitting with Lily as the brunette sat atop a barrel, rubbing her stomach. Rory stood beside his wife while the Doctor paced and Avery guarded the door… although from what, they really couldn't say.

Toby was huddled beside Lily, something the Doctor wasn't exactly thrilled about but Lily had had every vaccine shot in the universe and across time so he supposed she should be safe from the boy.

As it was, the murderous Siren intent on snagging all of them was his biggest concern anyway, and the Doctor continued to ponder their current situation even as he replied to Rory absently, "Not my most dynamic plan, I realise."

"Tardis?" Amy suggested, confused, and Lily explained, "It's gone."

"What?" Amy gaped, and the Doctor added sheepishly, "Sorry. We might be stuck here for a while."

"So you're saying that we should all just wait here below?" Rory asked in disbelief, and Avery pointed out, "The sea is still calm, like a mirror. If you go out on deck she'll rise up and attack you."

"It's okay." The Doctor placated. "The calm won't last forever. When the wind picks up we'll all set sail."

"Until it does, you have to hide down here." Avery added.

"Look at you two captains, getting it on." Lily mused and the Doctor grinned at her.


He wasn't smiling twenty minutes later when the wind had still not picked up and they were still stuck in the hold. Amy and Rory were sleeping side by side while Avery settled beside his estranged son and tried to make amends… or, well he tried.

Lily took the Doctor out of the magazine as Avery tried to connect with his son again, knowing the Doctor's restlessness would not help an already strained conversation.

"Something's not right." The Doctor muttered as he paced across the Captain's cabin while Lily settled wearily into a chair. "There's something not right."

"Well, explain it to me again." Lily suggested. "You said she only attacks people who are sick and injured..."

"Like a shark that picks up the smell of blood." The Doctor nodded and Lily mused, "It's strange though. Why the sick and injured? Normally, a predator goes for the weak but a sick person is no good to anyone. The predator would get sick from eating diseased flesh."

"So, she's not eating them or she isn't infected by illnesses the way humans are." The Doctor muttered and Lily pointed out, "But if she's so strong she can attack a person who only has a tiny cut, why not just attack a perfectly healthy person?"

"Exactly." The Doctor muttered.

Movement in the corner of her eyes had Lily glancing to the side, but there was nothing. But she could have sworn… Amy appeared in the doorway and Lily blinked, startled.

"Amy?" Lily asked, when suddenly the Doctor stood up and he stared at the broken windows.

"Doctor?" The two women asked, startled by his sudden movement but the Doctor was staring at the empty space with a deep frown as if something had caught his attention.

"What is it?" Lily asked as she came up beside her husband, and he murmured, "Feels like something's out there, staring straight at me."

A crash sounded above, followed by the distinct sound of thunder.

"Man the sails!" The Doctor yelled, before looking at Lily, "Love, stay down here."

"What?" Lily said indignantly but he looked at her stomach.

"Oh, for the love of-" Lily muttered, and the Doctor kissed her cheek.

"I love you, too. Amy!" The Doctor dashed off, Amy following behind and Lily sighed but hurried down to the store room.


What was possibly ten minutes later, the Doctor came banging into the room, dripping wet and angry.

"Doctor?" Lily asked in alarm as Amy and Avery trudged in behind the Doctor, equally soaked and Amy equally angry while Avery was guilt-stricken.

"What happened?" Lily asked instantly, straightening up as she saw the two missing figures.

"Rory was knocked overboard." Amy answered miserably. "And the Doctor sent the Siren after him."

"And Toby?" Lily asked, but Avery lowered his gaze and she quickly shut her mouth. 'Now what?"

She looked at the Doctor who said grimly, "The Siren isn't just a ravenous hunter. It's intelligent. We can reason with it. And maybe, just maybe, they're still alive somewhere. We have to follow."

"Are you mad?" Avery exclaimed but the Doctor snapped, "If we ever want to see them again, we have to let the Siren take us."

"Using what?" Amy demanded, and Lily pointed to a covered barrel in the corner.

"That has fresh water." She pointed out and the Doctor nodded.

"How do we get her to come for us?" Avery asked and the Doctor pulled out a pin from his suit.

"We'll prick our fingers." He answered grimly. "All agreed? Yeah?"

He looked at Avery first, who hesitated before his eyes steeled over.

"Aye." He agreed.

"Aye." Amy added, and Lily said, "Aye."

"Aye." The Doctor finished.

Reaching over, he pricked Avery's finger, then Amy's. His gaze locked with Lily's as he pricked her finger next and she kissed his chin for luck as the Doctor pricked his finger last. A black spot had already appeared on all their hands, the Doctor's the last to spread across his palm. Lily lifted the barrel's cover and the Siren shot out immediately, her mysterious gaze fixed on the four as she began to sing.

It was a queer feeling as Lily felt instantly drawn to the Siren, who suddenly seemed like the most beautiful creature she had ever seen, and when the Siren reached out her hand, they didn't hesitate to take it. A blinding light and they all crumpled; Lily was vaguely aware that she let out a scream but she felt so at peace and so sleepy… she closed her eyes and for a moment the world faded into darkness.


When she awoke, Lily realized they were in a different place, a spaceship most likely given the tech around them and the metal floor they lay upon. She shivered, and the Doctor was beside her instantly, although given his soaked state he was in no position to really help her.

"Are you all right, love?" The Doctor asked softly and Lily nodded.

"I'll live." She promised as they all got up.

"Where are we?" Amy was next to speak as she looked around, and the Doctor spotted something on the other side of the room.

"We haven't moved. We're in exactly the same place as before."

They all stared through the front window of the spaceship, which looked out onto the deck of Avery's ship where the rain was still beating down on the abandoned deck.

"We're on a ghost ship." Avery muttered but the Doctor answered, "No. It's real. Space ship trapped in a temporal rift."

"How can two ships be in the same place?" Amy asked, puzzled, and Lily corrected, "It's technically not the same place. It's two different… dimensions, you could say."

"Two planes, two worlds, two cars parked in the same space." The Doctor added. "There are lots of different universes nested inside each other. Now and again they collide, and you can... step from one to the other."

"Okay, I think I understand." Amy said slowly and the Doctor muttered, "Good, because it's not like that at all. But if that helps."

"Thanks." Amy muttered sarcastically, and Lily patted her friend.

"All the reflections have suddenly become gateways." The Doctor murmured thoughtfully and he glanced around.

Spotting a piece of metal on the floor, he grabbed it and flung it at the window. Amy shrieked, expecting it to rebound or break the glass… but it simply went through as if the window wasn't there, before landing on the deck below.

The Doctor grinned and he asked, "Ever look in a mirror and think you're seeing a whole other world? Well, this time it's not an illusion."

Suddenly, something beeped behind them, and the group looked around, startled.

"The signal." Amy gasped, and the Doctor murmured, "Yes."

"Oh, this all makes sense now." Lily breathed while Amy stuttered, "The distress call."

"What is going on?" Avery asked, but the Doctor and Lily were already moving toward the back of the ship, following the signal.

Amy and Avery trailed behind, the former also slowly catching on as she said, "There was a second ship here all the time."

"And the Siren is on board." The Doctor murmured.

He opened the back door, only to jump back as it revealed an alien skeleton. Lily's hand shot out to grab the Doctor's arm in shock while Amy and Avery took steps back in alarm as the Doctor soniced the skeleton.

"Dead." He muttered, and Lily hissed, "You think? The question is, what killed him?"

"The Siren?" Avery asked slowly.

The Doctor didn't answer as he walked deeper into the room, which revealed the bridge. The entire crew was dead, however, their skeletal remains still seated in their seats. The Doctor examined the remains carefully while Amy stared at the windows of the ship, through which they could now see Avery's captain's cabin.

"You were right." Amy noted. "There was something staring at us the whole time. How long has this ship been marooned here?"

"Long enough for the Captain to have run out of grog." Avery pointed out, but Lily answered, "No, they're still in their seats. This makes less sense."

"I don't understand." Amy murmured, frowning. "If this is the Captain, then what's the Siren?"

"Same as us. A stowaway." The Doctor answered as he soniced the skeletons.

"She killed it?" Amy asked but the Doctor corrected as he read his sonic with a flourish, "Human bacteria."

"Oh..." Lily blinked, understanding, while Amy asked, "What?"

"A virus from our planet." The Doctor explained to Amy. "Airborne, travelling through the portal. That's what killed it. Didn't get its jabs."

He moved on, and the group followed as they made their way deeper into the ship.

"What're we doing now?" Avery asked and Lily glanced back.

"Isn't it obvious? We're looking for your son and Rory." She replied before facing the front again. "And our Sexy."

"Your what?" Avery balked but that was when the doors to another room slid open and the group found themselves in a sickbay of sorts.

There were people all over the room, hanging on beds that floated all over the room, all of them connected to tubes that hung down from the ceiling. On one side was a rack of data packs and the Doctor moved to examine those while the others looked around the room in amazement.

"McGrath!" Avery gasped as he recognized one of the men. "He's one of my men."

"He's still breathing." Amy pointed out, and Avery breathed, "My entire crew is here."

but then their eyes landed on the figures they had been searching for.

"Toby!"

"Rory!"

"The Tardis!"

Lily shook her head affectionately after the Doctor as he rushed to the Tardis, parked at the far end of the room, while Amy and Avery leant over their respective husband and son.

"We have to get them out of here." Avery said urgently as he felt his son, but Lily pointed out, "Hang on! Look closer."

She pointed at the boy, who had been pale and sickly aboard the ship but was now glowing despite being unconscious.

"His fever's gone." Lily explained while the Doctor came over and soniced the boy to confirm her analysis.

He then went to sonic Rory, and Amy pointed out, "He looks so well."

"She's keeping him alive." The Doctor explained. "His brain is still active, but all its cellular activity is suspended. It's not a curse."

He picked up Rory's hand and examined the black spot before comparing it to the data pad he'd picked up earlier.

"It's a tissue sample. Why get samples of people you are about to kill?"

"Help me get him up?" Amy asked as Lily wandered over as well.

The Doctor began to remove the tube that was connected to Rory's neck, but an alarm began to beep immediately.

"What'd you do?" Lily demanded, just as the Siren's singing began.

"She's coming." The Doctor whispered and Lily grabbed his hand and pulled him quickly away to hide. Avery and Amy joined them as they hid behind a bank of monitors just before the Siren appeared, still singing as she moved over to Rory. She stopped beside him where he was starting to wake and convulse, and almost instantly Rory calmed down and fell asleep again to her singing.

"Anaesthetic." The Doctor breathed at the same time Lily whispered, "Ohh… this is good."

"What?" Avery asked, and the Doctor explained, "The music. The song. So she anaesthetises people and puts their body in stasis."

The Siren had moved over to Toby, singing to the boy next, and Avery leapt out, gun raised.

"Avery, no!" The Doctor cried, alarmed, but the captain ignored him as he fired at the potential threat to his son.

Instantly, the Siren turned red and her singing stopped as she hissed furiously instead. The Siren began to advance on Avery as Lily cried, "Oh, no!"

Amy clutched her, pulling her back as Lily started forward… when suddenly the Doctor sneezed.

The Siren stopped in her tracks, her gaze turning to the Doctor instead. He glanced up, almost sheepishly, and the Siren's hands began to glow with fire as she began to advance on him instead.

"Doctor!" Lily cried while he scrambled back, muttering, "Fire. That's new. What does fire do? Burn? Yes."

"Doctor!" Lily cried as she pulled away from Amy and ran for her husband.

The Siren was advancing on the Doctor as he backed away, still muttering, "Destroy? What else? Sterilise! I sneezed. I've brought germs in!"

He blew his nose on a handkerchief and quickly threw it to the floor. The Siren blasted the offending article immediately, still red and hissing and Lily grabbed the Doctor's arm.

"Stop!" She cried.

"Lily!" The Doctor gasped in shock, but Lily grasped his arm as she stayed firmly before him while clutching her stomach with her other hand as she snapped, "I'm your wife, I'm not about to let anything kill you!"

Almost instantly, the Siren calmed down, turning green-blue once more as a serene expression returned to her face.

They all stared at her, and the Doctor breathed, "Oh..."

"You're hopeless." Lily breathed in similar understanding and the Doctor pointed out, "You didn't figure it out either."

"I've only seen her twice now." Lily shot back, and Amy asked, "What's going on?"

"She's a doctor." Lily explained.

Avery and Amy gaped while the Doctor explained, "This is an automated sick bay. It's teleporting everyone on board. The crew are dead, and so the sick bay has had nothing to do. It's been looking after humanity whilst it's been idle. Look at her. A virtual doctor able to sterilise a whole room."

"Able to burn your face off." Amy retorted, and the Doctor waved the minor detail away.

"Can I touch him now?" Amy demanded as she stood beside Rory, and the Doctor hesitated as he looked from the Siren to Amy.

"Amy, explain to her who you are." The Doctor ordered. "Like just now, when Lily explained she was my wife. The Siren backed off. She'll let you help Rory as well."

Amy pointed to herself as she said, "I'm his wife." She gestured at Rory. "Look, he's very ill, okay? I just want to look after him. Why won't you let me near my husband?"

The Siren held out a hand, and a circle of light appeared around it.

"Consent form." The Doctor murmured before he looked at Amy. "Sign it. Put your hand in the light. Rory's sick. You have to take full responsibility."

Amy did as she was told, and the Siren disappeared as soon as Amy's hand entered the circle. Amy quickly switched off Rory's life support, and immediately Rory began to choke.

"He can't breathe. Turn it back on." The Doctor ordered and Amy hastily turned the switch.

"What do we do?" Amy pleaded as she looked at her friends while Lily bit her lip. "I can't just leave him here."

"He'll die if you take him out." Avery pointed out from where he was looking after his son.

Amy bent over her husband, brushing back his hair and she whispered, "Rory? Rory, wake up."

Rory stirred, his eyes fluttering open.

"Where am I?" He murmured, and the Doctor explained helpfully, "You're in a hospital. If you leave, you might die."

Lily smacked him while Amy added quietly, "But if you don't, you'll have to stay forever."

"What?" Rory asked, and Lily explained softly, "If you leave, you'd be back to drowning. It could kill you."

Rory blinked before his gaze became determined.

"I'm a nurse." He suddenly pointed out and Amy blinked.

"What?" She asked, and Rory explained hurriedly, "I can teach you how to save me."

"Whoa. Hold on." Amy began but Rory pointed out, "I was drowning. You just have to resuscitate me."

"Just?" Amy repeated incredulously, but Rory insisted, "I trust you."

"What about them?" Amy asked, gesturing at the Doctor and Lily, who balked. "I mean, why do I have to be the one? Why do I have to save you?"

"Because I know you'll never give up." Rory replied quietly. Amy blinked back tears, on the verge of crying as she was faced with the most difficult choice she'd had to make yet.

The Doctor and Lily backed away as Amy struggled to make her decision, and the Doctor moved to talk to Avery quietly.

"We have to send this ship back into space." He said in a low voice. "Imagine if the Siren got ashore. She would have to process every injured human."

"What about Toby?" Avery asked in an equally low voice, and the Doctor shook his head.

"I'm sorry." He replied softly. "Typhoid fever. Once he returns it's only a matter of time."

Avery pursed his lips as he looked down at his son, before he asked abruptly, "What if I stay with him, here? The Siren will look after him. I can't go back to England. And what home does he have now, if not with me?"

"Do you think you can sail this thing?" The Doctor asked, and Avery smiled lightly.

"Just point me to the atom accelerator." He answered. The Doctor smiled back and clasped the other man's shoulder. Avery nodded at Lily who smiled at him kindly and returned the nod.

They returned to Amy and Rory as Rory said to Amy firmly, "I know you can do this. Of course, if you muck it up I am going to be really cross. And dead."

He succeeded in his goal as Amy let out a watery chuckle.

"I'll see you in a minute." She promised.

Rory took a deep breath and the Doctor ripped off Rory's restraints. Instantly, he began to convulse while alarms beeped, but the Doctor hurriedly picked up the flailing man, carrying him swiftly into the Tardis.

Amy and Lily were right behind him and as the Doctor lay Rory down, Amy bent down and began CPR.

"Come on, come on..." Lily muttered as she and the Doctor watched while Amy alternated between breathing into Rory's mouth and pumping his chest.

"Come on, Rory." The Doctor also began to mutter as they both prayed for a miracle. "Not here. Not this way. Not today."

"Please, please, please wake up." Amy begged between her own breaths. "Wake up. Wake up. Come on. Come on."

For the longest time, there was nothing. Lily bit back sobs while the Doctor bowed his head and Amy cried as she breathed into Rory's mouth. And then, Rory started coughing up water.

"Oh, thank the stars." Lily sighed, leaning heavily against the Doctor who wrapped his arm around her in equal relief as Amy sobbed while hugging Rory, who dazedly hugged her back.

"Amy." He whispered. "Amy, you did it. You did it!"


Later, they stood all together, crowded around the console smiling and laughing as usual.

"I thought I was an excellent pirate." Amy grinned and Rory teased, "I thought you were an excellent nurse."

"Easy there, tiger." Lily laughed. "Go get a room first!"

"We might just." Amy winked at her husband, who grinned back.

"All right, goodnight you two." The Doctor called from where he stood by the Tardis monitor.

Lily smiled as she hugged her friends while Amy replied with an equally amused smile, "Goodnight. See you in the morning, Lily. Doctor."

"Goodnight, Amelia." The Doctor answered, making Amy and Rory frown.

"You only call me Amelia when you're worrying about me." Amy pointed out as she eyed the Doctor suspiciously.

Lily glanced back at the Doctor, who stilled briefly before he looked back at Amy.

"I always worry about you." He answered lightly before shooing the couple off. "Now go to bed, Pond."

Amy shrugged but left with her husband and Lily returned to the Doctor's side just as he hastily switched something on the monitor.

"Is she still-?" Lily began and the Doctor nodded.

"Oh, Amy." Lily sighed while the Doctor glanced down at his hands; his wedding ring to be exact.

'Oh, Lily Tyler.' He thought to himself as his hands tightened on the console. 'What have we gotten into this time?'