This season is the awkward transition from a half-horror show about isolation, hopelessness, and hatred, into something a little less bleak, and more adventure/concept-oriented. This includes a horrible redesign of the set, a stupid new intro sequence that replaced the iconic original, and the crew suddenly remembering that they have an undisclosed number of large shuttles, most of which are destroyed over the course of the season. Also, Kryten becomes a regular - it's hard to image the show without him - and the show starts its hilarious tradition of shrugging off cliffhangers.
"Marooned" (more old-Red Dwarf style) and "Timeslides" (more new-Red Dwarf style) are as good as anything the show has ever done. The rest of the episodes are a bit weak and gimmicky, but, on the other hand, how could you not love female Holly? Or the rewind gags? Or Alphabetti Spaghetti? In spite of being a bit of a low point for the show, they manage to slip in some of the greatest sitcom moments of all time into the worst episodes.
The story the collection is named after - which is wonderful beyond words - was made into the movie Arrival. That film was pretty ambitious considering how uncinematic the original was. Beyond that, the math geek in me loved "Division by Zero". The other stories are extremely entertaining, occasionally clumsy, and a bit forgettable.