Last night, during Psychoville (BBC Two, Thursday, 9 July, 10pm) I got another thing to add to the list of things I’ll never un-see. That was, of course, the Black Lace ‘Superman’ dance routine undertaken by not-right David and his hideous mother after strangling a bloke and dumping him in a chest. Weirdly, that’s probably Psychoville in microcosm. A heinous crime almost soundtracked by a “cheering up tape” of a novelty act. Everything you need to know about Reece Shearsmith and Steve Pemberton can be found in that one, seemingly throwaway skit. It was grim, wonderful, funny, peculiar and immediate.

Related: More Psychoville reviews here

Last night’s Psychoville was a departure from previous episodes. Instead of switching between stories and location, the whole thing had a feeling of theatre about it. Watching it was almost like watching something on the stage, with one room and no discernible edit. It was a real treat and not something comedy usually tries out in prime-time.

What was also fun was the guest appearance of Mark Gatiss, who appeared as a ’50s dick (that’d be a police detective as opposed to Joseph McCarthy), to complete the League of Gentleman reunion on-screen. Naturally, Gatiss didn’t have a straight-forward character to portray, role-playing and providing the viewer with the opportunity to get filled-in on the back story and David and his mother. A neat little trick that was appreciated by me at least.

Through murder, cups of tea, make-believe, dance routines, a wonderfully placed knife, maniacal murder statistics, puns, clever stage-work, pubic lice, inappropriate relationships and a whistling kettle, Pyschoville eschewed the rest of the cast to make one of the most enjoyable bits of telly I’ve seen in yonks.

Sure, I enjoyed it for all kinds of poncey reasons, but away from all that, I got some good laughs and once more found myself thrashing around in the thicken soup of this murder-mystery (with laughs). It’s a fine achievement to make a great comedy in itself, never mind the twisting whodunnit? plot. This is very good telly, backed by great online content too (have you been trying the URLs that crop up in the show?). It’s got depth and wit. I’m loving it.