Les scolds Sandra Dickinson for not participating in one of the rounds, before being reminded that she's not supposed to be taking part.
Les often refers to the prize levels gained on the "Supermatch Game" as "points", before correcting himself and using the show's term of "blanks". However, in the second Supermatch Game he says "points" and doesn't correct himself.
When Les is speaking to Frank Thornton in the first game, Sandra Dickinson can be seen flipping over her "correct answer" tile, with Les having forgotten to do it earlier.
The triangle flap on Paul Shane's desk is crooked in the final game.
When the final tiebreaker is over, Les goes to say "Blankety Blank chequebook and pen", but instead says "Blankety Blank book and chequebook". When he has to say the term to another contestant afterwards, he opts to call it a "BBC chequebook and pen" instead.
Les stumbles over the word "aerobics" when introducing Lizzie Webb.
When introducing the first "Supermatch Game", Les talks about some of the audience still having their eyelids "awake" instead of open.
While the majority of the questions can be misconstrued as innuendo, the panellists rarely respond accordingly. However, for one game Stu Francis appears to have written something inappropriate for the family timeslot, with Les standing in front of him to obscure the view, and the camera cutting to the contestants as a big laugh can be heard from the studio audience.
While contestants are told they have as long as they want to make up their minds in the "Supermatch Game", traditionally they'll make a decision of which answer they'll choose almost instantly. When contestant Jean Robson spends a few moments pondering, Les quips "will you let me know when we're ready?".