Joanne Smith-Baldwin and Daniel Baldwin Joanne Smith-Baldwin and Daniel Baldwin

Daniel Baldwin filed for divorce from his wife of four years because he claims she threatened to kill him, TMZ reports.

In a declaration filed Wednesday, Baldwin claims his wife came into the bedroom and said she had watched a documentary on women who kill their husbands. "Now I know how to do it, I understand why they did it. You have been warned," she allegedly told him. Baldwin also says their daughter heard the remark and asked, "Is mommy going to kill us?"

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The Homicide: Life on the Street actor also claims that Joanne is "highly intoxicated" in their home and that she had woken up both of their children by screaming and throwing objects around the house. Baldwin also alleges that his wife physically hurt him multiple times — punching him in the head, slapping him, hitting him in the face with a phone and pulling a knife on him.

Baldwin says it was when Joanne punched him Sunday — and the police subsequently deemed her unfit to care for her children — that was his breaking point.

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Baldwin filed divorce papers a day after getting a temporary restraining order from Joanne.

"Due to recent events in our home and for the safety of my children and myself, I have made this decision," the actor told TMZ about the restraining order. "I have had my share of problems with drugs and alcohol many years ago and know firsthand how difficult a position she is in."

The couple, who married in 2007, have two kids.