Bob Newhart Returns to 'The Big Bang Theory' for Sixth Episode

'Bloopers' video includes guest stars

Newhart won Emmy for guest role

Bob Newhart is returning to "The Big Bang Theory" for his sixth episode, CBS announced Thursday. Newhart will reprise his role as Arthur Jeffries, a former colleague of Sheldon Cooper's (Jim Parsons) who died in the show's ninth season.

Newhart first appeared on "The Big Bang Theory" in the show's fourth season, and he has since won two Emmy Awards for his guest role. He is also known for his roles in "The Bob Newhart Show," "Newhart," and "Bob.