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'Big Bang Theory': Astronaut Buzz Aldrin to guest star

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Buzz Aldrin
Kevin Winter/Getty Images

Sure, The Big Bang Theory‘s Howard Wolowitz (Simon Helberg) spent time on the International Space Station, but did he walk on the moon?

Famed Apollo astronaut and Dancing With the Stars season 10 contestant Buzz Aldrin will appear as himself in a cameo on the Halloween episode, “The Holographic Excitation,” CBS announced Tuesday.

In the episode, the Big Bang crew gets together for a costume party at Stuart’s comic book shop. It airs Oct. 25, at 8 p.m. ET/PT.

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