Class: Nightvisiting

"Do you often see your parents after sex?"

This time the spotlight falls on Tanya as her late father seemingly returns to her, in her bedroom in the night, with a long, long stalk erupting from his back for hundreds of metres. Less foregrounded are others in the same situation- including Miss Finch, all experiencing the dangers of temptation. This is a good 'un.

Obviously we get to know Tanya much better, beginning with a montage of her growing up; now the entire ensemble cast has been well fleshed-out and are good, strong characters. We also learn more of Miss Quill ("Andrearth") and her very non-human species and this is all mixed into a somewhat metaphysical tale of "souls" and what looks awfully like the offer of Faustian pacts. Meanwhile April and Ram get to know each other better, reminding us that this is not exactly a gang of close friends to begin with. April's mum is paralysed because her alcoholic dad crashed the car- and he's coming out of prison soon; April shares some very personal stuff with Ram- and they kiss.

It's a nice touch that the Lan Kin are only on Earth because of the cracks on Amy's wall way back in The Eleventh Hour, connecting things to the parent programme. But Class is shaping up to be an unexpectedly superb bit of telly in its own right.