Years ago there were 4 bods who presented a well funny programme called "Who Dares Wins" Rory was one member, Tony Robinson was another who later became Baldrick and Julia Hills who was the estranged bird of the Snooker player in Murphy's Law 2 Weeks ago. and another guy whose name escapes me. It was about 15 years ago I think.
He also presented a gameshow called 'Trivial Pursuit' (based on the original board game) which ran for one short series on BBC1. Highlight of the series was undoubtedly the episode that I won in a dramatic finale by knowing that the first footballing knight was Stanley Matthews! (As a result of which I got a purple mountain bike and Rory McGrath, who wasn't very funny or friendly, got a career...)