David Harold Yost is an American actor and producer. Yost moved to California with hopes of becoming an actor, and won the part of Billy Cranston (Blue Power Ranger) in the television series Mighty Morphin Power Rangers three months after arriving. He starred in almost 200 episodes of the show’s first four seasons. He was the only cast member to appear in every single episode of the original series; his character never changed his colors or passed on his power coins to successors like the rest of the original cast. Yost’s most high-profile work was his appearance in Mighty Morphin Power Rangers: The Movie (1995), which took in over $60 million at the box office. The film served as a non-canonical alternate opening for the third season.