The Star Trek movie role was William Shatner's biggest regret

William Shatner starred as Admiral James T. Kirk in the original Star Trek series from 1966 to 1969. The actor's biggest regret is that he 'failed horribly' in the role of Admiral Kirk. He says: 'I failed horribly' and that it was a mistake to do so.

William Shatner shares his biggest regret from Hollywood career: 'I failed horribly' He took responsibility for "Star Trek V: The Final Frontier" flopping with critics, as he starred and directed. At 92 years old, he is opening up about what he regrets about his career.