
Earl Hammond began acting in radio at the age of 7 and continued working in that venue throughout his life. In the 1940s, he had a regular role as a young lawyer on a radio soap opera. From 1974 to 1982, he acted on the CBS Radio Mystery Theater, appearing in 189 episodes -- more than 12% of the entire run of the 1,399 episodes of that radio series. Hammond started his television career in the early 1950s, his first major role being as a regular called Sergeant Lane on the DuMont police drama "Inside Detective" (aka "Rocky King Detective," starring Roscoe Karns). At the same time, he also was the first of three actors to portray the title character in the short-lived ABC TV science-fiction adventure series Buck Rogers, which ran from April 15, 1950, to January 30, 1951. In the mid-1950s, he had a major role in the daily/noontime CBS television soap opera Valiant Lady as Hal Soames, the married love interest of the widowed title character. Hammond was perhaps best remembered for providing the voices of Mumm-Ra, Jaga, and other characters on the 1980s animated TV series ThunderCats, and for being the voice of villain Mon*Star on the 1980s animated TV series Silverhawks. He also was the voice of the Transformers villain Megatron in a series of children's read-along books. In 1994, Hammond was selected from among several hundred actors who auditioned to be the voice of Pope John Paul II on the audiotape version of the Random House book Crossing the Threshold of Hope. The publisher said the pope personally selected Hammond.
1998Buster & Chauncey's Silent NightMovieas Franz Xaver Gruber (voice)
1997The Secret of AnastasiaMovieas Tsar Nicholas II / Tuba (voice)
1993The Twelve Days of ChristmasMovie
1992NoëlMovieas (voice)
1992Peppermint RoseMovie
1989One Fish, Two Fish, Red Fish, Blue FishMovie
1987ThunderCats Ho! – The MovieMovieas Jaga / Mumm-Ra / Vultureman / Snowman / Turmagar / RoBear Bob / Nisida / Hammerhand (voice)
1987TigerSharksTV showas Captain Bizzarly (voice) · as Shad (voice) · as Walro (voice) · 26 episodes
1986The Adventures of the Galaxy RangersTV show65 episodes
1986SilverHawksTV showas Mon-star (voice) · 65 episodes
1986Thunderbirds 2086: Cloudburst & NightmareMovieas (voice)
1986SilverHawks: The Origin StoryMovie
1985The Life and Adventures of Santa ClausMovieas Santa Claus (voice)
1985ThunderCatsTV showas Mumm-Ra / Jaga / Vultureman (voice) · 130 episodes
1985ThunderCats: ExodusMovieas Jaga (voice)
1982Thunderbirds 2086TV show24 episodes
1980It’s a Heart!Movieas Scarecrow
1975The Heart That Changed ColorMovieas The Scarecrow
1974Star BlazersTV showas Voices · 77 episodes
1973The Weird Adventures of Mutt & Jeff and BugoffMovieas Bugoff (voice)
1970Attack of the MonstersMovieas Officer "Kon" Kondo / narrator (voice)
1966The Hired KillerMovieas Frank
1962Satan in High HeelsMovieas Rudy
1960The Clear HorizonTV show230 episodes
1959The Many Loves of Dobie GillisTV show1 episodes
195877 Sunset StripTV show1 episodes
1958BroncoTV show1 episodes
1957MaverickTV show1 episodes
1950Robert Montgomery PresentsTV showas Henri · 1 episodes
—Captain Video and His Video RangersTV show2 episodes