This is an 8x10 inch The Big Bang Theory (2007–2019) television photo signed in-person by Bob Newhart as Professor Proton (Arthur Jeffries). A strong modern television collectible tied to the long-running hit sitcom, it features his memorable guest role as the beloved children’s science show host, a standout recurring character in the series’ later-era storytelling. A late icon of comedy and television, Bob Newhart is remembered for his landmark sitcom work in The Bob Newhart Show (1972–1978) and Newhart (1982–1990), two defining series that helped shape modern television comedy. This item is certified authentic by PSA/DNA Authentication, Inc. Certification number – AC54865