*Uh oh, Gary Dourdanis in trouble with the law … again.

The actor was arrested Sunday night for allegedly breaking his former girlfriend’s nose, according to law enforcement sources

TMZ says a former girlfriend went to Dourdan’s home in Venice, CA Sunday night.  Cops received a disturbance call at around 9pm, arrived at the house but the woman had already left.  While the cops were there, someone called LAPD and said an injured woman was in a nearby alley — it was Dourdan’s ex.  Cop looked her over and it appeared she had a broken nose and she said Dourdan was the culprit.

The former “CSI” star was arrested and booked for felony battery.  He’s being held on $50,000 bail.

Dourdan and the LAPD are quite familiar with each other.  Back in June, he was arrested for possession of ecstasy, but was released just eight hours later on $10,000 bail. Police initially responded to a report that Dourdan crashed his car into two parked vehicles.