Nineteen years after Doug Ross said goodbye to ER, George Clooney is coming back to TV.

He's directing, executive producing and starring in Hulu's Catch-22, a six-episode miniseries based on Joseph Heller's 1961 book about an Air Force bombardier in World War II, but he's not completely ruling out a return to the hospital...especially if he can keep Grey's Anatomy from beating ER's record as the longest-running medical drama.

"I did know that," he said when asked about Grey's breaking the record after the Catch-22 TV Critics' Association panel. "That's got to stop. We gotta go back and do some more!"

Grey's will air its record-beating episode later this season (and even had a big party to celebrate it).