The crew have to crawl through Starbugs Ducts to get to the cockpit and advert disaster. 

The crew discovers parallel universe versions of themselves and Lister discovers something disturbing about his parentage. 

Ace Rimmer is back. Rimmer isn't pleased, he's even less pleased when he hears what Ace is asking of him. 

Curry supplies are low so Lister resorts to emergency measures, time-traveling the crew to pick up a take-away. Unfortunately they don't end up where planned and accidently interfere with the assassination of US president John F Kennedy.

When the Boys from the Dwarf discover a ship with a Time Drive they salvage it and are soon contacted by their future selfs. And they've changed quite a bit.

When Rimmer falls through a black hole and ends up on a deserted planet he sets about recreating it in his image..... literally.

When the crew have to trade with some Gelf, Lister isn't happy when HE is part of the bargain. 

Starbug is infected with a computer virus that sends them hurtling towards a Sun, Only Kryten can fix it but the rest of the crew have to head into his system via VR to lend a helping hand.

The Mysterious Legion offers culture, expertise and a Hard Light emitter for Rimmer... the only problem is he won't let the Boys from the Dwarf leave. 

When a genetically engendered life form can appear as your wildest desires then best keep an eye out for a strew because it'll probably be looking to suck out your brains.