After spending seven seasons at the Stratford Shakespeare Festival, Michael Therriault left the classical repertoire theater for musical theater, starring as Leopold Bloom in the short-lived Toronto production of The Producers.
In 2006, Michael portrayed Tommy Douglas in the CBC Television special Prairie Giant: The Tommy Douglas Story. He was subsequently nominated for a Gemini Award for Best Performance by an Actor in a Leading Role in a Dramatic Program or Mini-Series.
While on Broadway in a revival of Fiddler on the Roof, Michael got news that he had secured the role of Gollum in the Toronto premiere of The Lord of the Rings: The Musical. He received his second Dora for the performance.
When it closed, he returned to Saskatchewan to film the made-for-television adaptation of Guy Vanderhaeghe's The Englishman's Boy.
- Prairie Giant: The Tommy Douglas Story (TV Mini-Series)
- The Englishman's Boy (TV Mini-Series)
- The Ron James Show (TV Series)
- Sunshine Sketches of a Little Town (2012)
- Covert Affairs (TV Series)
- 19-2 (TV Series)
- Hemlock Grove (TV Series)
- The Bagel and Becky Show (TV Series) voice
- The Girlfriend Experience (TV Series)
- Damien (TV Series)
- Reign (TV Series)
- Cult of Chucky (2017)
- Alias Grace (TV Mini-Series)