A series that examines contemporary marriages addressing themes such as equal rights for gays, religious divides, ancient customs in conflict with modern culture and law, hidden drug abuse and economic migrants. This special series tackles all these issues through the eyes of the newly (and would-be) wed around the globe.

Mohammad and the Matchmaker - Iranian Mohammad is 47, single and looking for love in Iran. He is also a former heroin addict and HIV positive. In a country with the highest proportion of drug-users anywhere in the world but one where the discussion of drugs and AIDS is also taboo, Mohammad's search for happiness looks doomed, until his doctor sets out to find him an HIV positive bride.

Visit the BBC website to learn more about this episode and other World Weddings.