Thomas Gibson: The prior incidents that led to his 'Criminal Minds' firing

It was the third strike in five years that led to Thomas Gibson's ouster from "Criminal Minds" on Friday, according to multiple industry sources with knowledge of the situation.

The actor was fired by "Criminal Minds" producers ABC Studios and CBS Television Studios following an internal investigation of an on-set fight in which Gibson allegedly kicked writer-producer Virgil Williams during production of an episode that Gibson was directing.

The incident that took place about two weeks ago was the last straw for the studios, after two prior flare-ups. In January 2013, Gibson pleaded no contest to alcohol-related reckless driving after being arrested on suspicion of DUI. And in December 2010, he allegedly shoved "Criminal Minds" assistant director Ian Woolf during a late-night location shoot. That led the production studios to mandate that Gibson take eight hours of anger management classes.

Gibson, according to multiple sources, was a mercurial personality on set who could be personable and friendly at times and other times quick to anger. It was no secret that Gibson and "Criminal Minds" co-star Shemar Moore, who exited the series at the end of last season, had an extremely tense relationship. Sources said Moore's habit of arriving late to the set aggravated Gibson.

See photos of Thomas Gibson on "Criminal Minds":

Gibson's demands that the production schedule be juggled to allow him maximum flexibility in traveling to his home in San Antonio, Texas, was a source of friction with other actors and producers. One longtime staffer described Gibson as "selfish" in that regard.

The shoving incident came late at night just before the holidays in 2010 during a location shoot on the Sixth Street Bridge near downtown L.A. The chase sequence called for Gibson to drive quickly across the bridge. There was some confusion about when Gibson was supposed to set off, and after the take, he came out of the car yelling and confronting Woolf about safety concerns. Woolf, by multiple accounts, yelled back, after which Gibson shoved the director with both hands.

The incident rattled staffers because it appeared to mark an escalation of on-set tension for Gibson. There was surprise that he didn't face harsher discipline from ABC Studios, the lead production entity on the show. The flap also came in the midst of Gibson's negotiations on a new contract with the show — talks that were suspended until he completed his anger management classes.

Despite the altercation, Woolf remained on the staff of "Criminal Minds" until two years ago when he shifted to the spinoff "Criminal Minds: Beyond Borders."

After Gibson's DUI arrest in 2013, he lost the use of his driver's license for a period, which meant "Criminal Minds" staffers frequently drove him to and from the set for work.

See photos of Shemar Moore:

The past incidents weighed heavily on the studios' decision to terminate Gibson, even as it presents a significant creative challenge for the series. The actor has been a stalwart of the show since its inception in 2005. He'll appear in the first two episodes of the upcoming season, which were already completed prior to his suspension, but he will not return to the set to film any final scenes. "Criminal Minds" begins its 12th season on Sept. 28.

A rep for Gibson declined to comment for the story, as did ABC Studios and CBS Television Studios and "Criminal Minds" showrunner/exec producer Erica Messer.

Gibson's dismissal recalls the circumstances surrounding Charlie Sheen's ouster in 2011 by Warner Bros. Television from the CBS sitcom "Two and a Half Men." At some point, the potential for a studio to be liable for unpredictable behavior trumps even star power on a profitable series.

"Criminal Minds" has been a consistent player for CBS in primetime and a steady source of syndication profits for both studios.

Some sources who have worked with Gibson for years say they've never seen the dark side described by others. One source emphasized that he was a dedicated family man who was committed to spending as much time with his young children and aged mother as possible.

But others were not sorry to see him go.

"It's like a dark cloud has been lifted off that show," said one longtime staffer of Gibson's departure. "You never knew which Thomas Gibson was going to show up."

RELATED: Watch below for more on Thomas Gibson's firing: