Rimmer is taken prisoner inside his own mind and ends up being stripped, oiled, manacled, licked, chained, taunted, humiliated and nearly has a knobbly thing the size of a Mexican agarve cactus jammed up where only customs men dare to probe.

Who knows what evil lurks within the hearts of men? The Red Dwarf crew find out when they encounter their dark sides - four evil "doppelgangers" hell bent on their destruction.