Mulcahy established Edmonton’s Citadel Theatre as a major hub. He doubled the subscriptions and the theatre was packed every night. Mr. Mulcahy was fired in 1972 for criticizing the theatre’s leadership. At the time, he said it was because of “several irritating dissatisfactions I am undergoing with the theatre’s administration.” Mr. Mulcahy was the artistic director at five other Canadian theatres, most of them in smaller cities, from Fredericton, where he was director of the Playhouse, to the Press Theatre in St. Catharines, Ont. He was co-artistic director of the Shaw Festival’s first professional season. He also continued acting.