Diminishing returns apply to comedy more than any other entertainment – you can enjoy beloved albums or favourite movies countless times but jokes wear thin, characters annoy and catchphrases send you potty. And while Mitchell & Webb test that with their Numberwang sketches, Peep Show does the opposite: it just gets better. We open in the aftermath of Mark (David Mitchell)’s unwanted wedding to colleague Sophie (Olivia Colman); he’s trying to get his love life back on track but his feckless flatmate Jez (Robert Webb) is dead-set on ruining his every chance of happiness, lest Mark leave him alone and broke. Fuelled by schadenfreude, Peep Show shouldn’t be this easy to love, until you count the razor observations, bang-on support casting and against-the-odds likeability of the leads. It’s nice to see the same effort applied to extras too, this set’s novelties including a ‘Relationship Tree’ and scenes shot from Sophie’s perspective.