Thomas was born to Moreen Duff Muir (May 4, 1928 - May 18, 2022), a church organist for thirty years originally from Glasgow, Scotland, and composer of church music, and John E. Thomas (1926–1996), a medical ethicist from Merthyr Tydfil, Wales who was head of the Philosophy Department at McMaster University, and the author of several books.
The family moved temporarily to Durham, North Carolina, where Thomas' father attended Duke University and earned a PhD in philosophy.
As well, Thomas was a musical guest on the CTV children's show Whatever Turns You On (a short-lived spinoff of You Can't Do That on Television) in 1979.
Many of his songs have been covered by popular artists, including "Hold On" (Santana, 1982), "Chains" (Chicago, 1982), "The Runner" (Manfred Mann's Earth Band, 1984), and "Right Before Your Eyes" (America, 1983).
2004-Journey to Joke A Lot 2005-Big Wish In 2009, Thomas provided the music for the animated series Bob & Doug, based on the SCTV characters of the same name.
[citation needed] During the summer of 2016, Thomas was touring Ontario, Canada, with singers Murray McLauchlan, Cindy Church, and Marc Jordan, in the group Lunch At Allen's.