- Worked as the original warm-up comedian for Saturday Night Live in 1975, and appeared in several early episodes.
- Appears briefly in the 1980 film Fame.
- Had roles in two Spike Lee movies, Get on the Bus and Girl 6.
- An avid conspiracy theorist, authored 1999's UFOs, JFK and Elvis: Conspiracies You Don't Have to Be Crazy to Believe.
- His best-known character, Det. John Munch, has made an appearance on more than six different series, including Homicide: Life on the Street, three Law & Order franchises, The X-Files and UPN's short-lived The Beat.
- Resides in France when not working in the U.S.
- Dalia Danoch — Ex-wife
- Harlee McBride — Wife
- Frances Belzer — Mother
- Charles Belzer — Father
- Gail Susan Ross — Ex-wife
- Bree Benton — Stepdaughter
- Len Belzer — Brother
- Attended Dean Junior College, Franklin, MA
Season 8, Episode 6
- Birth Place: Bridgeport, CT
- Birthday: August 4, 1944, Leo
- Profession: Actor, Comedian, Author
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