group The Committee in several sketches on The Dick Cavett Show, including one sketch with guest Janis Joplin. Hesseman also appeared in a number of skits as part of The Committee in the 1971 classic film Billy Jack. Hesseman made several appearances as Mr. Plager, a member of the group therapy ensemble on The Bob Newhart Show, and later in the series was revealed to be gay. He became a playwright in the sixth season of the show, writing a play about the characters in the group. In several other episodes of the show, Hesseman's voice can be heard as a TV announcer. Hesseman is best known for his role as anti-disco disc jockey John "Dr. Johnny Fever" Caravella on the television sitcom WKRP in Cincinnati from 1978 to 1982, a role Hesseman prepared for by working as a DJ in San Francisco at KMPX-FM for several months. He was nominated for a Primetime Emmy Award for Outstanding Supporting Actor in a Comedy Series in 1980 and 1981 for his portrayal of Fever. He reprised the role of Caravella in nine episodes of The New WKRP in Cincinnati, and also directed several episodes of the 1991-93 series revival. He portrayed Sam Royer, the man who married Ann Romano (Bonnie Franklin) on One Day at a Time from 1982 to 1984. In 1986, he was in the Disney film Flight of the Navigator. Hesseman played teacher Charlie Moore on the ABC series Head of the Class for four seasons from 1986 to 1990. In 1994, Hesseman introduced lost footage of Janis Joplin in a documentary on Woodstock. He made three appearances on Saturday Night Live: one in which he paid tribute to, and told jokes about, the recently deceased John Belushi and the other in which NBC showed a picture of U.S. president Ronald Reagan, which Hesseman mooned off-camera. He also encouraged the viewing audience to moon the picture and send pictures in to NBC. In 1995, Hesseman played the role of the Marquis de Sade in Quills at the Geffen Playhouse in Westwood, California, which included one scene in which he was fully naked. In 2001, Hesseman had a role on three episodes of That '70s Show. In 2006, he played the unorthodox Judge Robert Thompson in three episodes of Boston Legal, and also appeared in an episode of House. During his appearance as Judge Thompson, Hesseman paid homage to