Gerald Cowan (also credited as "Gerry Cowan") played six roles on Coronation Street:
- Hire Purchase man Johnny Gibson in February 1961.
- Philip Laker, Elsie Tanner's neighbour in Altrincham in October 1967
- Hairdresser Adam in March and April 1970.
- A Shop Customer in The Kabin in June 1973.
- A TV Voice on a quiz show in October 1974.
- A Magistrate's Clerk in attendance at the trial of Brian Tilsley in November 1981.
His other credits include Biggles (in one of the episodes written by Tony Warren), Knight Errant Limited (in an episode featuring a rare pre-Annie Walker performance by Doris Speed) No Hiding Place, The Lovers, Shabby Tiger and Z Cars.