Complex sentence: Beginning on the stages of Toronto, Wincott played Mark Smeaton in "Anne of the Thousand Days", Bogey in "Play It Again, Sam" Wincott showed early on in his acting career that he was committed to any character he played.
Split into simpler sentences: Beginning on the stages of Toronto, Wincott played Mark Smeaton in "Anne of the Thousand Days". When he played Bogey in "Play It Again, Sam" Wincott showed early on in his acting career that he was committed to any character he played.