Malcolm McDowell

Malcolm McDowell will guest-star in the season premiere of Psych, TVGuide.com has confirmed.

McDowell will play a British diplomat who hires Shawn (James Roday) and Gus (Dulé Hill) to investigate the murder of a woman who turns up in his temporary residence in Santa Barbara.

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The Season 6 premiere, titled "Shawn Rescues Darth Vader," does not yet have an air date.

McDowell, 67, is best known for his roles in A Clockwork Orange and Caligula. He has also appeared in Entourage, Heroes and The Mentalist.

E! Online first reported the news.