Godfather / X Files/ Dallas Star Peter Donat Dead at 90

Peter Donat — who appeared on several popular TV shows during his 50-year career and played Mulder’s father on “The X-Files” — has died … according to his wife.

He reportedly died Monday at his home in Point Reyes Station, California from complications of diabetes.

Donat began his career in 1953 and was a familiar face on television for decades. He guest-starred and had recurring roles on shows like “Mission: Impossible,” “The F.B.I.,” “The Waltons,” “Hawaii Five-O,” “Hill Street Blues” and “Murder, She Wrote.”

Peter had a notable role in the famous “Who Shot J.R.?” episode of “Dallas” in 1980 … and played William Mulder, Agent Mulder’s dad, on 6 episodes of “The X-Files.” His film credits include “The Godfather Part II,” “The War of the Roses” and “The Game.”

The veteran actor had a long career on Broadway as well, making his debut in 1957.

He was 90.