Blake's 7: Voice from the Past

"Voice from the Past" is the tenth episode of series two 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 6th, 1979 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.