Blake's 7: Orac

"Orac" is the thirteenth episode of series one of the British science fiction television series Blake's 7. It was directed by Pennant Roberts with a script written by Terry Nation. It first aired on Monday, March 27th, 1978 on BBC One. In this episode, Roj Blake is part of a prisoner convoy on the shuttlecraft London en route to a Federation penal colony at Cygnus Alpha. He meet another prisoner named Kerr Avon, and the two formulate a plan to escape.