Enjoyable and amusing end to the season, as some long-running plotlines are resolved. Ruth Madoc, star of 80s holiday camp sitcom Hi-de-Hi!, continues her second career as a camp icon as she makes a guest appearance as Glynn's wife Rhiannon, relieved their "wife swap" holiday is at an end. Clive's luck doesn't seem to be getting any better when he invests unwisely in Spanish property - happily he, Tiger and Terri come up with a plan to get his money back. It's not all good news: Mateo's mother-in-law wants to kill him.

Fittingly enough, this hotel-based comedy is never short of guests - but the arrival of Joan Collins, playing Solana CEO Crystal Hennessy-Vass is still quite a surprise. Everyone is falling over themselves, some of them literally, to say, "What are you doing here?" Crystal embraces the morning cocktails and "three-star thinking" on offer from the salon boys, and has a proposition for Mateo and some alarming ideas on how to cut the wages bill to present to Joyce. Meanwhile, the Oracle (Johnny Vegas) returns in style.

Rather changed from its fractionally classier initial proposition, this is now pure mainstream sitcom, circa 1985. If anyone excels in making that kind of thing entertaining, however, it's Graham Linehan (who co-writes here). Tonight's episode finds Arthur turning over memories of his life as a gang member "with a chip on my shoulder the size of a family caravan", and his lost love, Eileen. All of which in a roundabout way finds him taking a flying lesson. Arthur's inability to understand that the clocks go back brings things to a chaotic end.

One of the more likable of the arena comedians, John Bishop is all about being down to earth. Still, he isn't afraid of a big production number when the occasion demands it, and with this festive show, that's precisely what he delivers. Never mind the obligatory pop stars (George Ezra; Ella Henderson). Forget about the mainstream support acts (Jack Whitehall and Jason Byrne). Bishop doesn't just do a set, he also performs a routine with 16 members of the dance troupe the Tiller Girls.

Whatever you may think of this vulgar panto-style Irish sitcom, it was d'most watched programme of last Christmas. Duly, the BBC has re-invested in two more specials packed with double entendres, ad libs, and actors corpsing. Tonight, following a spate of burglaries, Mammy invests in a "state of the art" alarm system from Buster Brady. True, this is a very uncool show, but it is end-of-the-pier stuff done as well as you're likely to see without an actual pier. It also contains a good joke about the merits of newspapers versus iPads.

The penultimate episode of Sam Bain and Jesse Armstrong's slightly strange drama/comedy proposition, and the show remains perched on the edge of a Charlie Brooker-style dark drama, without quite breaking through. Still, there is some strong satire, great acting and excellent jokes. As ever, the armed response guys get the best lines, even in the middle of a cover-up ("I've shot him in the back. You can't make it out on these cameras"), while Liz attempts to turn a missing child into a career opportunity.

Follow-up to BBC Four's spoof rockumentary, starring Simon Day as Peter Gabriel. Sorry, as Brian Pern, the ex-frontman of progressive rock band Thotch. Brian has been persuaded by his manager (Michael Kitchen) that a bankable way forward for him and his former bandmates is a new "jukebox musical" of Thotch music, in the vein of We Will Rock You. Paul Whitehouse and Nigel Havers are great as Brian's colleagues, but it's surely Gabriel who comes out of this best, for not trying to sue.

From the geriatric ward to the life of the dog trainer - that's the leap attempted here by Vicki Pepperdine and Joanna Scanlan, writers and stars of the fine Getting On. This sitcom introduces us to Scanlan's penurious dog trainer, Nana V, and Pepperdine's bureaucrat Mrs Singh, and watches their worlds collide. Tobias Menzies is the recently widowed owner of a misbehaving king charles cross, but with the main jokes deriving from his animal's fondness for eating faeces, this may struggle to match the team's high standards.

One of a series of "taster" comedy pilots hatched by BBC Three earlier this year, OtherwOrld isn't really one that does the channel any favours. The idea? We're on another planet, a place not hugely unlike Earth (but one with aliens) to the extent that even the low-rent sketch show staples, crowbarred hopefully into an overarching theme, are fairly familiar. There's a bit about pandas having sex that is better than that description might lead you to believe but, otherwise, the best you can say about this is that it's mercifully short.

Filmed like a nature programme or a folk music documentary, Detectorists is that kind of comedy (like Silicon Valley or High Maintenance) that doesn't so much generate laughs as cumulative warmth. This week, Lance (Toby Jones) and Andy (Mackenzie Crook) are on to something in Farmer Bishop's field. While they try to play it cool, affection mounts for the details of their world: their enemies (the "beards" and "antiquisearchers"), their neat homes, and the tricks of their trade. As Andy says, "You can learn a lot from the amateurs".