TBS is celebrating the life of comedian and actor Bob Newhart with a Big Bang Theory marathon, featuring the best of his “ Professor Proton ” episodes.

Related: Jane Fonda recalls friend Bob Newhart's neighborly kindness: 'I will miss our times together' Newhart made his first appearance on the hit Chuck Lorre sitcom in its sixth

The cast of ‘The Big Bang Theory’ are just a few stars paying tribute following the death of actor Bob Newhart.

Bob Newhart's passing was met by many people sharing touching tributes on social media and other platforms. The late star, who was a few years shy of being a centenarian, once revealed how he was recruited to star in a major television sitcom.

Newhart died at his home in Los Angeles after a series of short illnesses, said his longtime publicist Jerry Digney. Newhart had two hit shows - first playing a psychologist on fr