A soldier from the far future is accidentally teleported back to our present. The psychiatrist assigned to examine the soldier realizes that he has been bred purely as a killing machine, but he believe he can reawaken the warrior's humanity. Meanwhile a second soldier arrives, dedicated to hunting and killing his enemy. Written by
Did You Know?
Commands issued through the helmets of Qarlo and The Enemy are supplied by two different voice actors, and the actor assigned to each helmet keeps changing throughout the episode. See more
Referenced in Doctor Who: Sleep No More