The Doctor, Martha and Jack had landed on another planet, and as usual, they were being taken into custody. Something about Jack shaking hands with the wrong person. When they got to the police station, the Doctor and Jack were thrown in a big holding cell and Martha was dragged off.
"Where are they taking her?" the Doctor asked anxiously, straining against his shackles.
"To another holding cell," said a voice from the dark. "Something about boys and girls not being allowed to be locked up together anymore."
"Yeah, and it's not like it's your fault at all," said another voice.
"Hey, I only broke out once. It's not my fault they assumed it had something to do with the girls."
"Cale?" Jack asked incredulously. "And Lock?"
"Jack?" two voices exclaimed.
As their eyes adjusted to the light, Jack and the Doctor could see two young men shackled to either side of the cell. "How did you two end up here?" Jack asked.
"It's a prison," the younger one said. "We kind of always end up in here."
"Who's your friend Jack?" the other asked.
"This is the Doctor," Jack said.
"Hi," the Doctor said, waving.
"Doctor this is Cale and Lock. They're old friends of mine." He pointed to the elder, and then the younger of the two men.
"Out of curiosity," Lock said. "Can either of you two pick locks?"
"Nope."
"You know I can't Lock." The younger man sighed.
"It's down to me then, obviously." He sat on the floor, his hands shackled behind his back and lifted his right shoe to his mouth. Using his teeth he peeled the sole off and threw it on the floor next to Cale.
"You have lock picks in your shoe?" the Doctor asked.
"Never leave home with out 'em," Lock said proudly. "Cale, kick them behind me." Cale did so and Lock went to work. Seconds later he stood, shackles falling from round his wrists.
"You picked the lock on the shackles without looking?" the Doctor asked incredulously. The young man grinned.
"They don't call me Light-fingered Lock for nothing."
When they were all unlocked, Lock started work on the cell door. "Come on," he said. "We'd best find the girls before Cat blows the place up. Again."
"He's joking right?" Jack asked Cale.
"I wouldn't be so sure," Cale replied. "Cat kind of is a teenage pyromaniac."
"Hey let me go!" Martha cried. The guards ignored her and threw her in another holding cell, one down the corridor from where the Doctor and Jack had been.
"Are you all right?" a voice asked. Martha looked up, her eyes adjusting to the dark, and saw four teenagers shackled to the wall.
"I'm fine thanks. Just a bit bruised."
"Yeah, those guards can be really rough," a blonde girl said. "I'm Elspeth by the way, who are you?"
"I'm Martha."
"Valerie." A girl who looked like Elspeth but with dark hair and eyes.
"Riley." She had black hair and brown eyes.
"Cat." Brown hair and mischievous brown eyes. "Can you pick locks?"
"No," Martha said.
"Bother. We'll have to wait until Lock comes to find us." Valerie sighed.
"Do you have a box of matches Cat?"
"Uh duh."
"Kick 'em over here." Martha watched as Cat fished around in her pockets for a box of matches and then kicked them across the floor to Valerie. Valerie kicked them behind her and set to work picking the lock on her shackles.
"You can pick locks?" Cat asked in obvious surprise.
"Obviously. Now hush, I'm concentrating." Seconds later she stood and began going round the room, unlocking all of the shackles. "Come on, let's go see what those boys have got up to."