Barry Jenner, who had roles in Family Matters, Dallas, Star Trek: Deep Space 9 and several other series, died Monday of acute myeloid leukemia at Cedars-Sinai Medical Center in Los Angeles , per The Hollywood Reporter. He was 75.

Jenner played Carl’s nincompoop boss Lt. Murtaugh for several seasons of Family Matters and DS9′s Admiral Ross in Seasons 6 and 7. He also was Dr. Jerry Kenderson for 25 episodes of the ’80s drama Dallas.

Jenner’s other TV credits include Silk Stalkings; Walker, Texas Ranger; Remington Steele; Knots Landing and Days of Our Lives.