Reunion ( ST short story ) Reunion was the fourteenth short story in the Short Trips anthology " Short Trips and Side Steps " . It was written by Jason Loborik . It featured the Second Doctor . Summary . Dan Blackwood , an average thirty - year - old , is picked up by Martha at a pub . He had told her about his dreams , and she says she has a friend that can help him . Dan is a bit drunk , and only later wonders how he could have let himself trust a complete stranger . Martha takes him to the tube station , though it appears deserted . They board a carriage that is full of male passengers . Dan blacks out , and when he wakes up , he is surprised he still has his wallet . He notices the other carriages are completely empty , and the men in his carriage are staring forward blankly . The train is moving , not stopping at any stations . Dan blacks out again , having one of his dreams , and this time when he wakes , Martha and a man named Dobtcheff are present . Dobtcheff is examining the men and determines that one is no good . Martha , now just as glassy - eyed as the men , pulls a gun on the man , ready to shoot him . Dan protests , and Martha turns the gun on him . Suddenly they hear music coming from one of the empty carriages . A man who is playing a recorder joins them , introducing himself as the Doctor . He offers Dobtcheff his help , as he has noticed that whatever Dobtcheff ' s plan is , it ' s not working as he would like . Dobtcheff starts whispering , and one by one the men on the train join in . Dan tries to fight it , but he is pulled into the whispering too , and blacks out once again . The Doctor wakes him with a slap and brings him out of the train . Dan tells him everything that happened . The Doctor realises that Dobtcheff is using the men to achieve something , and wonders if it has to do with a nearby time distortion . The Doctor wants to know what happened during the fifteen minutes Dan was possessed by Dobtcheff , but Dan can ' t remember . The Doctor hypnotises Dan and learns some of what Dobtcheff is doing . They hear a loud rumbling noise coming from the tunnel wall . The Doctor realises the tunnel is under the Thames . Martha comes out of the carriage , holding the gun . The Doctor shuts the door on her , and she drops the gun . Dan retrieves it . They return to the carriage . The men are dead , and Dobtcheff has reverted to his natural form , with scales over his body and pincers in place of hands . He explains that he came to Earth in his ship in the future , but was attacked and thrown back eight hundred years into the past . For revenge , he took over a human baby and passed what the Doctor calls a " parasitic infection " down through the generations . Dan and the men on the train were some of the baby ' s descendants . Dobtcheff needed them to help him retrieve his ship , which is underground . However , his ship is coming through the ground to him , and the Doctor fears it will kill them . It is not strong enough to break through the tunnel , though , so Dobtcheff uses Dan ' s mind to set the controls to auto destruct , which will destroy half of London . The Doctor has also linked with Dobtcheff , and tells Dan to undo what he just did . Dan successfully reverses the auto destruct , and Dobtcheff has died . Dan sees the Doctor enter a large blue box , which disappears . Later , Dan wonders about the other possible descendants of Dobtcheff . Continuity . " to be added "