In films from 1950, actor William Campbell was most often seen in secondary "best friend" or bad-guy roles. In 1955, he starred as "death-row lawyer" Caryl Chessman in Cell 2455 Death Row. Three years later, he co-starred with Paul Birch in Cannonball, a popular Canadian-based syndicated series about long-haul truckers. Star Trek fans will instantly recognize William Campbell as the malevolently childlike titular alien Trelane from the 1967 episode "The Squire of Gothos." ~ Hal Erickson, All Movie Guide