Buzz Aldrin

Another astronaut is heading to The Big Bang Theory.

Buzz Aldrin is set to make a cameo on the Halloween-themed episode that airs on Thursday, Oct. 25, CBS announced Tuesday. 

Vote for your favorite new TV shows in our Fall Popularity Contest!

Aldrin, the second man to walk on the moon, is the second astronaut to appear on the CBS comedy following Mike Massimino, who portrays himself as a member of Howard's (Simon Helberg) crew in space.

The Big Bang Theory airs Thursdays at 8/7c on CBS.