Captain (Wild Blue Yonder)
A captain was a member of an equine-looking species who commanded a spaceship which ended up at the Edge of Creation.
Falling through a wormhole, her incredibly large spaceship became lost at the very edge of the known universe. The captain discovered the not-things, which was a discovery so horrifying that it led her to install a mechanism onboard the ship, that would slowly reconfigure it into a bomb, and had a robot installed to an incredibly slow walk towards the activation button as well as a very slow countdown to self-destruction. This would ensure that the monsters she had found would not understand what she had done. The captain then opened an air-lock on her spaceship and jumped out into the nothingness, killing herself, and ensuring they couldn't copy her thoughts to know what she did.
Three years on, when the Fourteenth Doctor and Donna Noble arrived, her corpse had been caught in the gravity field around the spaceship, causing her spacesuit to collide with the ship and create a banging noise. Her corpse was incinerated when the spaceship finally exploded, taking the not-things with her. (TV: Wild Blue Yonder [+]Loading...["Wild Blue Yonder (TV story)"])