There's an offscreen clatter around the 3 minute mark when Terry is reading a question about the Wizard of Oz. Terry starts the question again, quipping: "That was just before he fell over, he said..."
During the second "Supermatch Game", the pull back slide for the 50 point answer gets momentarily stuck at the end.
Contestant Terry Cavender gives what sounds like a terse response to Terry Wogan mishearing his last name as "Calendar", causing Wogan to joke "there's no need to shout, Terry".