Blake's 7 1979 S02E06

Episode: Trial. Holding himself responsible for Gan's death, after Gan was killed by Travis at the Central Control computer complex on Earth. Blake decides to desert the crew and teleports to the surface of a volcanic planet, where he finds he is not alone. Travis is standing trial at Federation HQ for the massacre of innocent people. Travis's trial is Servalan's cover up of the incident at the Central Control computer complex.