Matt Damon believes Tony Gilroy's first draft for 'Bourne Ultimatum' was ''unreadable'' and could have been a ''career-ender''.
The actor has slammed the writer - who has taken over as director of the franchise in 'The Bourne Legacy', which Matt doesn't appear in - for submitting an "unreadable" script for the last movie, which he had agreed a deal to pen one outline and not have to do any re-writes himself.
He said: "I don't blame Tony for taking a boatload of money and handing in what he handed in. It's just that it was unreadable. This is a career-ender. I mean, I could put this thing up on eBay and it would be game over for that dude. It's terrible. It's really embarrassing. He was having a go, basically, and he took his money and left."
Matt decided not to continue with the franchise because he felt the series would need to find a whole new angle in order to continue to be successful.
He explained to the new issue of America's GQ magazine: "If you look at the first three movies, we kind of pounded that idea of identity and amnesia into the ground. We really got everything out of it that we could. So to reboot it, we need to come up with something completely new."