Although Terry Wogan's "wand microphone" is openly just an affectation (his real microphone can be seen pinned to his lapel) this is made explicit after the first Supermatch Game, where he talks with the microphone held away from himself, but with no loss in audio. Similarly, When Terry places a mug over his wand microphone, Kenny Everett notes that there's "no loss in sound".
During the first "Supermatch" game, the cover for the second answer is partially dragged across when the first one is revealed; appearing to be a cheap card mechanism pulled by an off-screen crew member. The camera cuts to Terry Wogan and the contestant, before cutting back to the Supermatch board with the second answer once again fully covered.
During the "Head To Head" game, the two female contestants are having a conversation and not listening to the answer of panellist Barry Cryer. Wogan notices, and makes a joke out of the situation.
Wogan keeps constantly talking to the contestant in the decision part of the final game, before she stops him and says "I'm trying to think, Terry, just a minute".