Peter Bonerz (born 6 August 1938) is an American actor and director. He is best known for his role as Dr. Jerry Robinson, the eccentric orthodontist in The Bob Newhart Show.
He had several more TV appearances in the late 1960s and also had roles in several films, including Funnyman (1967); What Ever Happened to Aunt Alice? (1969); Medium Cool (1969); Catch-22 (1970), which also included his future co-star Bob Newhart; Jennifer on My Mind (1971); and Fuzz (1972).
In 1971, Bonerz was part of an ensemble cast in the short-lived improvisational television show Story Theatre, which also included Alan Alda and Valerie Harper. In 1972, he landed the popular supporting role of Dr. Jerry Robinson, the eccentric orthodontist in The Bob Newhart Show, whose most frequent comic foil was Marcia Wallace as Carol, the sharp-tongued receptionist. Bonerz would reprise this role in a cameo appearance in the final, unaired episode of Bob Newhart's third series, Bob. He also directed 29 episodes. The show ran for six seasons, with ratings among the top 20 in the first three seasons.
His later acting roles included one in the TV miniseries The Bastard (1978) and one as a psychiatrist in the movie Serial (1980). In 1979, Bonerz appeared in Password Plus as a celebrity guest star with Marcia Wallace, his costar from The Bob Newhart Show. In 1986, Bonerz co-starred with Tuesday Weld and River Phoenix in the television movie Circle of Violence: A Family Drama. In 1999, he played Ed Weinberger in the movie Man on the Moon. He voiced Sal in the Aaahh!!! Real Monsters episode "Internal Affairs". In 2014, he played Doug Demarco in the "Anniversaries" episode of Parks and Recreation. He directed a number of sitcom episodes for series such as Paul Sand in Friends and Lovers, Foley Square, My Sister Sam, Friends, Murphy Brown, Wings, NewsRadio, Home Improvement, It's Your Move, Archie Bunker's Place, and ALF. He also directed a few films, such as Nobody's Perfekt (1981) and Police Academy 6: City Under Siege (1989).