Sebastian Giovinco scored a 95th-minute winning goal to conclude another wild affair between the two rivals and deliver the Reds their sixth Canadian Championship.
The Italian converted from a Raheem Edwards cross from close range not long after being denied a stonewall penalty in a game that was, to say the least, controversially refereed.
Toronto were fuming about a reckless Kyle Fisher challenge on Steven Beitashour on the stroke of half-time and the denial of what appeared to be a stonewall penalty for another Fisher challenge on Giovinco after the break.