A/N: Hello all! Sorry it's taken me a while to update...I've started back at university this week so everything's chaotic again and I don't have as much time as I would like. Thanks to all who reviewed the last chapter:

Rwyf-Yn-y-Blaidd-Drwg, alyssa love, Shifuni, D0ctor, Simpa007, MayFairy, Mrs 11thand Brownbug.

I hope you all like the reappearance of an old friend in this chapter...clue's in the title!

Greyhound 40

The darkness was hurting Amy's eyes. The Doctor and Jack were a way up ahead, fiddling with the large security gates of UNIT's base. She had no idea why they'd left her on lookout; her eyesight was surely worse than both of theirs. But the Doctor insisted that breaking and entering was a 'boy's game'. Amy rolled her eyes.

"Amy!" The Doctor stage-whispered. "Amy, come on! We're in!"

With one more glance into the quiet night, Amy hurried up to them. The Doctor was grinning madly, arms flailing with excitement.

"Isn't this fun? Being a bit naughty, doing something we shouldn't! You know, Fred would love this..." He trailed off, his face falling when he remembered why they had to break into UNIT in the first place. Amy placed a comforting hand on his shoulder and he did the same to her. There was a moment of meaningful silence before Jack snorted and said,

"You two are so lame. Can we get on with the fun part now?" He bustled past them, creaked open the gate and poked his head inside. The Doctor and Amy grinned at each other and followed.

Inside there were two guards, their guns trained on Jack.

"Ah." The Doctor said, arms up in surrender. "Now, now. No need for that. We come in peace...sort of. Just doing a bit of snooping, really."

"Shut up!" Jack hissed as two more guards arrived, guns alert. The main guard nodded and the other three grabbed a prisoner each. The Doctor protested but to no avail.

"Will you be quiet?" Jack hissed again as the three of them were dragged off inside.

"What's wrong with you all of a sudden?" The Doctor asked a little hoarsely, a guard pulling on his shirt collar. The Doctor glared at him. "And will you watch the bow tie? It's vintage!" The guard paid him no attention.

"I'll tell you what's wrong." Jack said, irritated. "Once all of this is over, you'll jet off again but I'll still be here and I'll be getting it in the neck for breaking in! I could lose my position for this, so don't make it any worse!"

"Will you both be quiet?" Amy bellowed from behind them, scowling as she was man-handled by a guard. "I don't think either of you are helping."

Sitting on the floor of a concrete cell with a futuristic human and a mad Time Lord wasn't a highlight of Amy's life. Jack was peering out of the bars on the door, trying to charm anyone who was passing into opening it. The Doctor was led flat on his back, muttering about the guards taking away his sonic screwdriver and how one earth they were going to get out. Amy leaned back against the wall, closing her eyes.

If only Rory and Fred were here. She longer to hear Rory make a scathing comment about the Doctor's lack of a plan and she missed Fred's ability to cheer everyone up (particularly the Doctor who rarely seemed miserable when she was around).

"Hey you! Wanna let me out of here so we can have a real talk?" Jack shouted to a solider outside, winking. Evidently, the soldier had no desire to have a 'talk' with Jack. Jack slid down next to Amy. "This is hopeless, Doc. Got any ideas?"

"Several! I have just had a great idea about making a moving cat out of paper but enough of that now! Stop distracting me, Jack! I need to focus!"

The door swung open and a handsome soldier stepped inside, looking awkward rather than fierce. "Here, they said to give you some food."

Amy made to say thank you and Jack was about to launch a charm attack on the poor young man but the Doctor cut across both of them, looking at him in amazement.

"Ross Jenkins!"

The soldier looked at the Doctor, alarmed. "Yes. I am."

"Course you are! I wouldn't have said it if I didn't know! I never forget a face!" The Doctor stood hurriedly and clapped excitedly.

"Excuse me, but have we met before?" Ross Jenkins replied, still clutching the tray of food.

The Doctor's face fell. "No. No, of course we haven't. Not yet."

Ross nodded slowly, unsure of what the Doctor was talking about. He suddenly remembered the tray in his hands. He held it out to the Doctor who took no notice; he was still gazing at Ross with a mixture of joy and sadness on his face. Amy took the food, nodding her thanks.

Ross had an odd feeling bubbling in his stomach; he felt like he knew that bizarre man. He felt like he'd met him before. But he hadn't. Not yet, the man had said. What did that mean?

He slumped down in his seat in the officer's mess, not paying any attention to his colleagues' chatter around him. He felt restless. Suddenly, his radio crackled.

"Greyhound 40, come in. Greyhound 40! You're needed in the cells! Prisoners loose!"

Ross scrambled to his feet, unexplained anticipation coursing through him.

"You see! I told you I could get us out!" The Doctor bellowed to Amy and Jack over his shoulder as they sprinted down the UNIT corridors, two groups of soldiers on their tails.

"Yeah, but when you said 'get us out' I didn't think you meant setting off all the alarms on the way out!" Amy growled.

"We need somewhere to hide!"

The Doctor swerved into an empty store room and the three of the closed the door, hearing the soldiers run past them. They leaned against the door, getting their breath back.

"You know," Jack began with a dazzling grin. "I'm never usually one to run away from handsome men in uniform."

The Doctor spluttered and Amy gave a chuckle. When the noise outside faded away, the Doctor clambered to his feet.

"Right. Come on! We need to get going. They're bound to have heat seeking in here and when they crack that out is only a matter of time before they find us. So we'd better keep on the move! Now, if you had a load of confiscated items, where would you keep them? Easy! At the centre surrounded by locks and doors and vaults and...some other stuff that's incredibly hard to get into! And on that note...let's go!"

His Lieutenant had given Ross a heat seeking ray and sent him off down corridors, telling him to scan every room he could come across. Usually, Ross put everything into his work but he was just strolling past the rooms half heartedly, idly pressing buttons. Something didn't feel right about hunting down these three strangers.

Just as he was about to turn back to the Mess, the heat seeking ray beeped and he heard voices whispering along the next corridor.

"Who's there? I can hear you!" Ross called, peering around the corner to see three figures.

"Oh, Ross! It's just you, thank goodness!" The Doctor beamed, puffing the hair out of his eyes. "Thought we were in trouble for a minute."

"You are in trouble. There are soldiers everywhere looking for you."

"Oh, come, come, Ross, let's not be silly. You don't want to give us up, do you?" The Doctor wheedled.

Ross faltered and decided to change the subject. "How did you escape?"

"Oh, simple really. There was an exposed wire from the light in the cell. Managed to reprogram its function and crack open the door. Child's play."

Ross opened his mouth and closed it again, finding words had escaped him.

"Oh, I'm the Doctor by the way! Forgot to introduce myself. Not surprising when I already know all about you. Oooh, that sounds a bit weird doesn't it? A bit stalker-ish. I'm not I promise." Amy elbowed him in the ribs. "Ow! Sorry. I'm rambling, aren't I? Didn't mean to. Just get a bit excited when I meet an old friend again."

"You didn't get this excited when you met me again." Jack interrupted.

"No, well. I know what you're like. You interpret friendly excitement as...something else."

Amy tutted just as the distant sound of footsteps echoed down the corridor. "I really don't think now is the time for this!"

"Alright, alright. Ross listen to me. Give us the pass key to this door and I promise you won't regret it. Please."

Ross hesitated and the footsteps grew louder. He found himself torn. He knew he should do his job and hand over the three strangers but something was stopping him. What? Why shouldn't he give them up? He knew nothing about them; only that they had tried to break into UNIT. So surely they were his enemy...right?

"Ross, I want you to know that I will be sorry. So, so sorry for the events of that day when we meet. I mean that." The Doctor's eyes sparkled with sadness.

"What do you mean? I don't understand. How do you know the future?"

"You'll never know if you don't let us through this door. UNIT will take me prisoner and that day will never happen. By coming here and seeing you, I changed history. Now only you can put this right."

The footsteps were so close now. They echoed in Ross' head before suddenly, he lunged forward. For one horrible moment, the Doctor thought he was trying to grab him but Ross rushed past him and entered the code 266178 into the keypad. The door slid open.

The Doctor smiled. "Thank you, Ross."

Ross nodded before he raised his gun to his face and hit himself twice. Amy gasped and Jack made to stop him. The Doctor looked at him questioningly.

"You hit me and ran away. Didn't you?"

"Yes. Yes, we did. Thank you...again."

"Now go!" Ross commanded. "Quickly!"

Amy and Jack hurried through the door, the Doctor just behind them.

"I'll be seeing you in a year!" The Doctor cried as he disappeared through the door and out of sight.

Ross stared at the closed door blankly. Something in him had changed.

I hope you all liked Ross' starring role in this chapter. It's all down to the wonderful D0ctor! I think Ross may appear in later instalments in the series...

Anyway, please leave a review! Thanks!