Award-winning actor and Broadway star Alan Cumming made his name playing roles in films such as Goldeneye and X-Men. However his childhood was spent far from the glamour of Manhattan where he now lives. Growing up in the small town of Aberfeldy, Scotland, Alan knew very little about his family history. With his parents now both in their seventies, he feels it's time to see if he can clear up one big question lingering in the family's past. The mystery relates to Alan's maternal grandfather, Thomas Darling. A career soldier who spent most of his life away from home serving in the army, he died, aged just 35, in mysterious circumstances in Malaysia. This, by the by, is the last in the current series of WDYTYA. If you've been following Dragon's Den, the final episode of that is also on at 9.00pm (BBC2).