Rimmer catches the crew going on a fishing trip without him, forcing them to reluctantly bring him along. However, Starbug collides with the ship of Ace Rimmer, a more popular and successful version of Rimmer from an alternate universe.
Arnold "Ace" Rimmer is a daredevil test pilot for the space corps, and he has been assigned to test-pilot a ship that can travel through dimensions, so he can meet many different versions of himself. He enters our dimension to meet our Rimmer, who has gone on a fishing holiday with the crew.—Daniel Williamson