The Inquisitor
S5, E2: The inquisitor is a rogue droid that wanders through time and space, weeding out beings that it deems to be useless. The Red Dwarf crew are next in line.

S5, E2: The inquisitor is a rogue droid that wanders through time and space, weeding out beings that it deems to be useless. The Red Dwarf crew are next in line.