"Martha, what are you doing?" the Doctor said as she stepped up onto the narrow ledge.
"Well, you seem to like it up here, so I thought I'd join you and see what's so fascinating. Don't think much to the view. Mind you, you do seem to have drawn a crowd."
"Martha, get down now!" the Doctor said.
Martha shook her head. "You can't order me around, not anymore. If I want to stand on a crumbling ledge, then I will."
Jack had started to move towards Martha when he saw what she held in her hands, what she had behind her back...she was playing a dangerous game.
He started to edge diagonally, so that he could be as near to the Doctor as he could. He knew what was in that hypodermic, knew it would be instant, knew that the Doctor could fall either way...he would be ready.
The Doctor had stood on the ledge and looked down, he was drawing a crowd, which he wasn't too happy about.
Then he'd seen a familiar black SUV pull up...Jack.
Fine, let him try and talk him out of this.
What he hadn't expected was Martha stepping up onto the ledge with him...he suddenly felt a flutter of indecision.
"Martha, get down now!" he ordered her, and panicked when she disobeyed him...it wouldn't be suicide anymore, it would be murder.
He tensed when Martha started to walk towards him, hands clasped behind her back, casually looking down at the distant crowd.
"Martha, please," he pleaded.
He was too busy concentrating on Martha to notice Jack edging his way, nor to wonder why Martha had her hands behind her back.
"Martha, I said get down now!"
Martha shook her head again and moved again.
The Doctor was torn between throwing himself of the roof or grabbing Martha.
He less selfish side won out and he moved.
Martha and Jack saw the move at the same time, and everything happened in slow time.
Martha whipped the hypodermic from behind her back and grabbed hold of the Doctor as he grabbed her, and stabbed the needle in the nearest piece of exposed flesh she could see.
The effect was almost instant and Jack had to move faster than he expected, as the Doctor started to sway.
He would have fallen if Jack had been a second too slow, as he fell forward.
Martha hated seeing the look of betrayal in the Doctor's eyes as he slumped into unconsciousness, but it had to be done.
She slipped the empty syringe back in her pocket and followed Jack as he hefted the Doctor over his shoulder and hurried after him down the stairs.
When they reached the bottom, Gwen was busy trying to persuade what looked like a senior police officer that this was a Torchwood problem.
"I'm sorry, but he has to be taken in for questioning and for psychiatric evaluation."
"I can't let that happen, he's Torchwood staff and our responsibility."
Gwen looked over when she heard footsteps.
"You can take it up with my boss if you like, but he doesn't look in the best of moods."
The police officer looked over to where Gwen was looking and recognised the man immediately as one Captain Jack Harkness.
"Fine, but if he's seen on the streets again, it won't matter if he's the pope. He'll be arrested and sectioned, understood."
Gwen nodded and walked over to join Jack who was now carrying the Doctor.
"In the car," was all he said and said nothing else as they piled in, Ianto pushing Sarah Michaels inside.
The silence was uncomfortable and lasted until they had stepped off the ramp.
Jack placed the Doctor gently on the lounger and turned back to the group.
Without warning he reached out to Sarah Michaels and grabbed her by her throat and pulled her forward.
"Listen and listen carefully. You will get that thing out of him, or so help me I will personally send White Coat a message as to where and when he can find you," he snarled.
Sarah looked at the others but they just turned away, purposely ignoring her. She swallowed and took a deep breath before speaking.
"I can't."
Jack frowned, and then his face clouded again. "What do you mean can't?"
"I can't remove, only he knows how to remove it safely. If I try he would certainly die."
"But you said..."Martha began to say.
"What that I could cure him, you tend to say anything when someone's threatening to kill you. No, I can only put him out of his misery, only White Coat can cure him."
Jack had refused point blank to even think about letting Sarah Michaels contact White Coat. He didn't want that snake anywhere near the Doctor.
His resolve lasted until the Doctor came round and chaos ensued.
"Gwen, get that cell door open, now!" Jack yelled.
At first the Doctor had seemed a little out of it when the sedative wore off, and they had left him on the lounger.
Jack and Ianto had escorted Sarah Michaels down to one of the cells and had just locked her away when an almighty crash echoed down the stairs.
Now himself and Ianto were man-handling a cursing, biting Time Lord down to the same block of cells.
The confusion was made worse by the fact that every Weevil in the block was howling in response to the Doctor's curses.
They shoved the Doctor inside and only just slammed the door, before the Doctor threw himself against it.
Both of them recoiled as the Doctor's eyes were once again clouded and black veins were showing through almost translucent skin.
"Let me out!" the Doctor screamed, slamming his whole weight against it.
Jack backed away, but never took his eyes of the enraged Time Lord... and hung his head in defeat.
He turned to the cell that held Sarah Michaels and unlocked it.
"Call him," was all he said.