A duel of words and wit in which Wynford Vaughan-Thomas, Kathy Breck and John Trevelyan compete against Peter Jones, Barbara Shelley and Alfred Marks. Referee: Don Davis. Devised by Mark Goodson and Bill Todman. Producer: David Carter.
If this is the one then it is 16th Feb 1967 and it is the only one in the archives! If it si different, then you could double their holdings in a stroke!