Babylon 5 star Michael O'Hare has died at the age of 60.
The actor, who starred as Commander Jeffrey Sinclair in the sci-fi series, passed away on Friday, five days after he suffered a heart attack and slipped into a coma.
Babylon 5 creator J. Michael Straczynski has paid tribute to O'Hare, calling his loss a terrible blow.
He writes in a post on Facebook, "This is a terrible loss for all B5 fans, and everyone involved with the show wishes to convey their condolences to the O'Hare family. He was an amazing man."
O'Hare was a regular cast member in the first season of Babylon 5, and he also made appearances in the second and third seasons. His TV work also included roles in Law & Order, L.A. Law and soap opera One Life to Live, and he performed in the original Broadway production of A Few Good Men.