Doing Time ( short story ) Doing Time was the eleventh short story in the Short Trips anthology " " . It was written by Lance Parkin . It featured the Fourth Doctor . Summary . Shepard has a moment of panic . He and Adams are in the power stacks . They carefully remove a cylinder and put it in a bag . Shepard is nervous . They head out , Shepard leading the way . They open the double doors and come out onto the moon ' s surface . The settlement is nearby . Their shuttlecraft is in the opposite direction , Morgan waiting at the controls . Shepard wonders if it could really be this easy , but they make it to the shuttle and take off . Adams states , " We got away with it . " They board a warp ship and destroy their shuttle . Adams stays in his quarters to guard the bag . They change ships , then dock at Gateway Nine Zero Zero One on their way to meet their contact . As they push through the crowd , Shepard briefly loses sight of the other two . He is confronted by a tall man and a woman . The woman calls the man " Doctor " , and Shepard is afraid . The Doctor knows what he has taken , but Shepard thinks he is trying to make a deal . The Doctor tells him that if he doesn ' t change his ways , he will end up " doing time . " Shepard joins the other two , and they meet their contact , an alien creature . They give him their prize , the impeller for a TARDIS time rotor . The creature gives them a molecular sequencer that will change anything to gold , up to the amount of their promised payment . The creature leaves , and the next day the men deposit the gold in the bank . They go their separate ways , and Shepard returns home to Celeste . The next morning , he happily realises this is the first day of the rest of his life . Shepard has a moment of panic . He and Adams are in the power stacks . They carefully remove a cylinder and put it in a bag . Shepard is nervous . He experiences a moment of déjà vu . They head out , Shepard leading the way . They open the double doors and come out onto the moon ' s surface . The settlement is nearby . Their shuttlecraft is in the opposite direction , Morgan waiting at the controls . Shepard wonders if it could really be this easy , but they make it to the shuttle and take off . Adams states , " We got away with it . " They board a warp ship and destroy their shuttle . Adams stays in his quarters to guard the bag . They change ships , then dock at Gateway Nine Zero Zero One on their way to meet their contact . As they push through the crowd , Shepard briefly loses sight of the other two . He has a sense of déjà vu again , but something is missing . . . a man and a girl . Shepard joins the other two , and they meet their contact . Shepard has a moment of panic . He and Adams are in the power stacks . They carefully remove a cylinder and put it in a bag . Shepard is nervous . They head out , Shepard leading the way . Shepard realises they are repeating events . They open the double doors and come out onto the moon ' s surface . The settlement is nearby . Their shuttlecraft is in the opposite direction , Morgan waiting at the controls . Shepard wonders if it could really be this easy , but they make it to the shuttle and take off . Adams states , " We ' re trapped . " They board a warp ship and destroy their shuttle . Adams stays in his quarters to guard the bag . At the station , Shepard realises that each repeating cycle is half the length of the last one . He will never see Celeste again . Shepard has a moment of panic . He and Adams are in the power stacks . Shepard says they are being punished . They carefully remove a cylinder and put it in a bag . Shepard is nervous . They head out , Shepard leading the way . They open the double doors and come out onto the moon ' s surface . The settlement is nearby . Their shuttlecraft is in the opposite direction , Morgan waiting at the controls . Shepard wonders if it could really be this easy , but they make it to the shuttle and take off . Adams states , " We got away with it . " Shepard has a moment of panic . He and Adams are in the power stacks . They carefully remove a cylinder and put it in a bag . Shepard tells Adams that the next time they have to remember not to take the rotor . Shepard has a moment of panic . He and Adams are in the power stacks . He warns Adams not to take the rotor , but it is too late . Shepard knows the next time there won ' t be any time to warn Adams . Shepard has a moment of panic . Continuity . " to be added "