Mohammad and the Matchmaker

10pm, BBC2

Here's the story of an unusual and poignant marriage. Mohammed is 47, smart, sophisticated and keen to find a wife; Maryam, at 21 already a widow, is desperate for a husband.

Aside from the age difference, is anything likely to stand in the way of romance? Well, they both live within the strict religious strictures of Iran. And both are HIV-positive.

Mohammad contracted the virus when he was a heroin-user (which raises the littleknown fact that Iran has the highest percentage of heroin addicts in the world). Maryam was given HIV by her husband, before he died of an Aids-related disease.

Not the most auspicious starts to a relationship, and their first date is hardly a whirlwind of passion either: a cagey meeting in a café. But from such unlikely beginnings, a romantic tale develops.

This is a touching and memorable account of how different life can be - and how the hope of finding love (or a partnership, at least) stays alive against all odds.