Big Bang Theory: What happened to Professor Proton? Why did he leave? | TV & Radio | Showbiz & TV | Express.co.uk
Big Bang Theory': Bob Newhart Returning — Season 9 Spoilers, Casting | TVLine
Bob Newhart wins his first Emmy for 'The Big Bang Theory' | EW.com
The Big Bang Theory" The Proton Resurgence (TV Episode 2013) - IMDb
Bob Newhart and Bill Nye to guest star on 'Big Bang Theory'
Big Bang Theory' Books Bob Newhart's Return, Adds Bill Nye – The Hollywood Reporter
The Big Bang Theory': Bob Newhart says guest stint 'was like a rock concert' | Big bang theory, Bigbang, Sheldon
Big Bang Theory': Bob Newhart Returning in Final Season 12 as Proton | TVLine
TV Babble Podcast: Bob Newhart Talks His Long Career & 'Big Bang Theory' Return
The Big Bang Theory' Sneak Peek: Bob Newhart is “Professor Proton”
Bob Newhart signed 8x10 photo PSA/DNA Autographed Big Bang Theory | eBay
Bob Newhart returns to "The Big Bang Theory" - CBS News
From Bob Newhart to Stan Lee, 25 great 'Big Bang Theory' guest stars. - cleveland.com
Bob Newhart to Guest Star on 'The Big Bang Theory', Reprising Role as Arthur Jeffries - Variety
Bob Newhart and Bill Nye to guest on 'The Big Bang Theory' | EW.com
Big Bang Theory' Sets Bob Newhart's Return in Season 11 – The Hollywood Reporter
The Big Bang Theory' Season 7: Bob Newhart Returns as Professor Proton
Bob Newhart Set to Return to 'The Big Bang Theory'
The Big Bang Theory' Season 11 Spoilers: Bob Newhart Returning | TVLine
Fine Tuning: Bob Newhart comes back with a Big Bang - Victoria Times Colonist
Bob Newhart, aka 'Professor Proton,' bids farewell to 'Big Bang Theory'
Bob Newhart finally earns an Emmy for 'Big Bang Theory' role - CSMonitor.com
The Big Bang Theory' Cast Is So Happy to Have Bob Newhart Back for the Final Season – Watch! | Entertainment Tonight
Bob Newhart's force is with 'The Big Bang Theory'
Bob Newhart on His 'Big Bang Theory' Gig: 'It's Like Going Back in Time' – The Hollywood Reporter
