Katey Sagal revealed her final moments with “8 Simple Rules” co-star and onscreen husband John Ritter before his “mind-blowing” death. During her appearance on Ted Danson’s “Where Everybody Knows Your Name” podcast this week, Sagal recalled she “was there” when Ritter died at age 54 in 2003. “We were doing press pretty much at four in the afternoon on that day and then by 10 o’clock that night, he left us,” the actress remembered. Sagal, 72, added, “It was mind-blowing.” “8 Simple Rules” was early in production on Season 2 when Ritter collapsed on the set of the sitcom on Sept. 11, 2003. The Emmy Award winner was rushed to the hospital and…