MacLennan was a writer and co-producer on Showtime/Showcase's "Queer as Folk", and was executive producer for Keatley Productions/CHUM TV's flagship series, "Godiva's".
MacLennan was a writer and Co-Executive Producer on Showtime/Showcase's "Queer as Folk", writing 14 episodes over four seasons, the most of any writer. He then co-created, and was executive producer for Keatley Productions/CHUM TV's flagship series, "Godiva's".