premise: Mark Donovan (born 12 October 1968) is a Welsh character actor best known for his roles in productions such as "Shaun of the Dead", "Black Books", "In Bruges", and "Murder Investigation Team". He also played a brief scene of Hamlet in an episode of the David Renwick comedy-drama, "Love Soup". His stage roles include Gozark in "Singin' in the Rain" and Inspector Clay in "Plan 9 from Outer Space".
hypothesis: Donovan was born 20 years before he played Hamlet on stage.
reason: We have no idea how old Donovan was when he played Hamlet.