The hellraising actor was fired from the comedy last year (11) after a public war-of-words with series creator Chuck Lorre, and was replaced by Ashton Kutcher.
Sheen is now back on the small screen in the U.S. with the lead role in Anger Management and he wasted no time in taking revenge on his former bosses, aiming a series of barbed comments at them during the new show's opening scene.
When the programme began, Sheen was seen in a therapy session ranting, ""You can't fire me, I quit! You want to replace me with some other guy? Go ahead! It won't be the same... You think I'm losing? I'm not. I'm... anyway, you get the idea.""