Spaceship (Wild Blue Yonder)

A spaceship was lost at the edge of the universe. At some point it was infiltrated by shapeshifting creatures.

It was later visited by the Fourteenth Doctor and Donna Noble. The two discovered that the captain had set the self-destruct, but on slow so as to keep the Not-Things from figuring it out and stopping it. The Doctor sped up the self-destruct and he escaped with Donna aboard the TARDIS as the ship exploded, taking the creatures with it. (TV: )