Star Trek celebrity guest John Larroquette playing Maltzin an appearance from The Search for Spock. He's a famous TV and movie actor.
The top picture is the actor in normal circumstances, and the bottom picture(s) is of the actor in their specific role(s).
A famous TV and movie actor, with his most famous roles as Dan on Night Court, and in Baa Baa, Black Sheep . Also starring in his own show, plus Richie Rich, Madhouse, Blind Date with Bruce Willis, Summer Rental with John Candy, Meatballs Part II, Cat People, and even Altered States as an x-ray technician.
Star Trek III: The Search for Spock -Playing Maltz -Klingon officer serving under Kruge. He was captured after Kirk took Kruge's bird-of-prey following the death of Kruge and the other Klingon crew members.