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Richard Jay Belzer (August 4, 1944 – February 19, 2023) was an American actor, comedian, and author. He was best known for his role as BPD Detective, NYPD Detective/sergeant and investigator John Munch, whom he portrayed for 23 years in the NBC police drama series Homicide: Life on the Street, Law & Order: Special Victims Unit and in several guest appearances on other series.
| Year | Film | Role | Notes |
| 1974 | The Groove Tube | Rodriguez, Leo Batfish, The President, The Hooker | Independent film |
| 1980 | Fame | M.C. | |
| 1982 | Café Flesh | Loud-mouthed audience member | |
| Author! Author! | Seth Shapiro | ||
| Night Shift | Pig | ||
| 1983 | Scarface | at Babylon Club | |
| Likely Stories, Vol. 3 | Richard | ||
| 1986 | America | Gypsy Beam | Moonbeam |
| Charlie Barnett's Terms of Enrollment | Man Reading Paper | ||
| 1987 | Flicks | Stoner | Segment: "New Adventures of the Great Galaxy" |
| 1988 | The Wrong Guys | Richard 'Belz' Belzer | |
| Freeway | Dr. David Lazarus | ||
| 1989 | The Big Picture | Video Show Host | |
| Fletch Lives | Phil | ||
| 1990 | The Bonfire of the Vanities | Television Producer | |
| 1991 | The Flash II: Revenge of the Trickster | Joe Kline | |
| Missing Pieces | Baldesari | ||
| Off and Running | Milt Zoloth | ||
| 1992 | Flash III: Deadly Nightshade | Joe Kline | |
| 1993 | Mad Dog and Glory | Comic | |
| Dangerous Game | Himself | ||
| 1994 | North | Barker | |
| The Puppet Masters | Jarvis | ||
| 1995 | Not of This Earth | Jeremy Pallin | |
| 1996 | Girl 6 | Caller – Beach | |
| A Very Brady Sequel | LAPD Detective | ||
| Get on the Bus | Rick | ||
| 1998 | The Bar Channel | — | |
| Species II | President | ||
| 1999 | Jump | Jerry | |
| 2006 | Copy That | Richard | |
| 2007 | BelzerVizion | Himself | Also executive producer |
| 2009 | Polish Bar | Hershel | |
| 2010 | Santorini Blue | Richard | Also executive producer |
| 2016 | The Comedian | Himself | |
| 2017 | Gilbert | Himself | Documentary film |
| Year | Film | Role | Notes |
| 1975–80 | Saturday Night Live | JurorChevy ChaseHimselfMuseum Visitor | Season 1 episode 1, season 2 episode 3, season 2 episode 27, season 3 episode 61, and season 5 episode 106 (uncredited) |
| 1978 | Sesame Street | Man in Row Boat | Episode: "(#1186)" |
| 1983–1984 | Thicke of the Night | Regular | |
| 1984 | The Richard Belzer Show | Himself | Six episodes |
| 1985 | Hot Properties | Host | |
| 1985 | Moonlighting | Leonard | Episode: "Twas the Episode Before Christmas" |
| 1986 | Miami Vice | Captain Hook | Episode: "Trust Fund Pirates" |
| 1989 | Tattingers | — | Episode: "Ex-Appeal"a.k.a. Nick & Hillary |
| 1990–91 | The Flash | Joe Kline | 10 episodes |
| 1991 | Monsters | Buzz Hunkle | Episode: "Werewolf of Hollywood" |
| 1992 | Human Target | Greene | Episode: "Pilot" |
| 1993–99 | Homicide: Life on the Street | Det. John Munch | 122 episodes, regular cast |
| 1994 | Lois & Clark: The New Adventures of Superman | Inspector William Henderson | Episode: "All Shook Up"Episode: "Witness"Episode: "Foundling"Episode: "The House of Luthor" |
| Nurses | Jesse Wilner | Episode: "Fly the Friendly Skies" | |
| Bandit Bandit | Big Bob | TV film | |
| Hart to Hart: Crimes of the Hart | Det. Frank Giordano | ||
| 1995 | Prince for a Day | Bernie Silver | TV film; a.k.a. The Prince and the Pizza Boy |
| The Invaders | Randy Stein | TV film | |
| 1996 | Deadly Pursuits | Mariano | |
| 1996–2000 | Law & Order | Det. John Munch | Episode: "Charm City"Episode: "Baby, It's You"Episode: "Sideshow"Episode: "Entitled" |
| 1997 | The X-Files | Episode: "Unusual Suspects" | |
| Richard Belzer: Another Lone Nut | Himself | HBO comedy special | |
| When Cars Attack | TV film | ||
| 1997–98 | E! True Hollywood Story | Episode: "Gilda Radner", "John Belushi" | |
| 1998 | Elmopalooza | — | |
| 1999 | Mad About You | Detective Sharp | Episode: "Stealing Burt's Car" |
| 1999–2016 | Law & Order: Special Victims Unit | Det./Sgt. John Munch | 325 episodes, regular cast |
| 2000 | Homicide: The Movie | Det. John Munch | TV film based on the television series |
| The Beat | Episode: "They Say It's Your Birthday" | ||
| South Park | Loogie (voice) | Episode: "The Tooth Fairy Tats 2000" | |
| 3rd Rock from the Sun | Himself | Episode: "Dick'll Take Manhattan: Part 1" | |
| 2005 | Law & Order: Trial by Jury | Det. John Munch | Episode: "Skeleton"This is a crossover sequel to the episode "Tombstone" from season 15 of the series Law & Order. |
| 2006 | Arrested Development | Episode: "S.O.B.s" (uncredited)Episode: "Exit Strategy" | |
| 2008 | The Wire | Sgt. John Munch | Episode: "Took" |
| 2009 | Jimmy Kimmel Live! | Episode dated October 7, 2009 | |
| Comedy Central Roast of Joan Rivers | Himself | — | |
| 2013 | America Declassified | Season 1 episode 1 | |
| 30 Rock | Season 7 episode 12 | ||
| 2015 | Unbreakable Kimmy Schmidt | A John Munch-like character | One episode: "Kimmy Goes to the Doctor!" |