Not Star Trek, Not DR Who..............little know Sci-fi from Leftist BBC in the late 70's..........Blakes 7.

Our Hero "Avon" is a computer mastermind, gets caught trying to steal billions of "Credits" from the system. He is shipped off earth with Blake & others to the Prison planet Cyuis Alpha......on the way there they attempt to take the ship which fails but is put abord a space ship found a drift..........Blake uses the ship to attack the "Feds".........Avon is not intrested, but goes along for the ride...

I found his dry hummor refreshing:-