Charlie Sheen’s public unraveling on Two and a Half Men really became obvious in early 2011 , with the biggest turning point coming in March 2011 when he was fired from the show.

Quick timeline

  • In the late 2000s , there were already signs of instability and off-screen trouble.
  • By early 2011 , his behavior had become a very public mess, with the feud involving Warner Bros. Television and Chuck Lorre escalating fast.
  • In March 2011 , CBS/Warner Bros. terminated his services on the series.

What people usually mean by “started to lose it”

If you mean when viewers could see it on the show’s timeline , the clean answer is: around the end of Season 7 into Season 8 , with the off-screen chaos fully taking over in 2011.

If you mean his personal/public spiral , that was more gradual and had been building for years before the firing. The 2011 blowup was just the moment it became impossible to miss.

In plain terms

So the short version is: the slide was underway earlier, but the “he’s really losing it” moment was 2011.

He was still a huge TV star right up until the collapse, but 2011 is when the situation went from tabloid noise to a full career break.

TL;DR: Charlie Sheen’s visible breakdown on Two and a Half Men peaked in 2011 , especially March 2011 when he was fired, though signs had been building before that.