The name of the episode he appeared in was called Biting the Hands and it aired on April 11, 1989 at 9:30 pm. This particular episode was produced by BBC Scotland, the director was Carol Wilks, the producer was Norman McCandlish and the episode was written by Rona Munro.
Synopsis:
"Linda and Gail are Hell's Belles - an alternative comedy double act. When success begins to beckon, they must decide whether to change their act or keep doing what they believe in. Are their principles justified - or are they just 'biting the hand that feeds them'?"
Linda was played by Judith Sweeney and Gail by Louise Beattie.
Here is the review from The Glasgow Herald - April 15, 1989 by Julie Davidson