William Campbell is remembered by Star Trek fans for his memorable turn as the duplicitous Klingon commander Trelane in the cult-favorite episode The Squire of Gothos, but he made an even bigger splash as the star-crossed Klingon captain Koloth in The Trouble With Tribbles. His commanding presence and sharp delivery brought these alien antagonists to life, leaving a lasting impression on the original Star Trek series. Outside Star Trek, Campbell also worked on classic projects like director Robert Altman’s McCabe & Mrs. Miller, displaying his ability to inhabit complex, layered characters with ease. His performances stand out for blending charm and menace in equal measure.