Are events in Last Tango in Halifax too bad to be true? 

Does love run out when life runs out? Or does it intensify, touching and changing all around it? Two series now on our screens make a strong case for the latter —  one is about love striking in old age, the other about young lovers struck by Aids. Both pack a wallop. Since its Bafta-winning first series last year, Last Tango in Halifax (BBC1, Tuesdays) — about a widower and widow, Alan and Celia (wonderfully played by Derek Jacobi and Anne Reid), who reignite their teenage romance by getting engaged in their seventies — has been lauded for its celebration of love among the over-35s. But pensioner passion is not the only surprise this show offers — indeed, as the weeks go by, you realise that’s the least surprising thing about it. The family drama throws us a twist every few minutes: past abortions are divulged, financial fiascos announced, possible murders mooted and ex-lovers recalled or re-rejected, or both.