Porridge 9.30pm, BBC1
Dick Clement and Ian La Frenais have opted to replicate the gentle humour of their original comedy rather than update it, but they’re sailing perilously close to the fluffy and cliched here. Tonight’s story involves the switching of cakes, one belonging to Fletch (Kevin Bishop), the other – baked with magic mushrooms – to the jail’s cartoon heavy. When an officious new staff member helps herself to the latter, zero hilarity ensues. Viewing through rosetinted glasses may be wise.