Commander Jask was a Sontaran who Mickey Smith and Martha Jones hunted. He was about to shoot them when the Doctor knocked him out with a hammer to his Probic vent. (DW: The End of Time)
Behind the scenes
- Jask was not named on screen or in the credits. However, his name was given in the script to The End of Time Part 2, which is available for download on the website for The Writer's Tale.