In the 1980s and 1990s, Cullen appeared on a number of television shows.
He has played Coran, Stride the Tiger Fighter, and King Alfor in the Lion Voltron series, the transforming spaceship/robot Ramrod, the heroic Commander Eagle and the villainous Nemesis in the 1980s anime series Saber Rider and the Star Sheriffs, Commander James Hawkins in the Vehicle Voltron series, Eeyore in the Winnie the Pooh franchise, Original First Voice of KARR in Knight Rider, Antor and Bomba, and Gunner, in Dino-Riders, Airbourne, Nemesis Enforcer and Zandar in G.I. Joe, He played Mantor/Mantys in Coleco's 5 episode mini-series Sectaurs in 1986; Red Skull in the 1981 cartoon series of Spider-Man, Klaar and Zanzoar in Megas XLR and Mantus in The Pirates of Dark Water.
He also had a voice part in the 1984 motion picture Gremlins (as a gremlin) and in the first season of the 2008 Knight Rider series, where he reprised his vocal role as KARR (from the original Knight Rider series).
He also did voicework in The Greatest Adventure: Stories from the Bible series, notably as Japheth, one of Noah's sons in the "Noah's Ark" episode, and the King of Nineveh in the "Jonah" episode.
He was well known by some as the main villain Venger in the animated series of Dungeons and Dragons.
He played the evil sorcerer Renwick in the lesser known series Little Wizards and played Cindarr in the short-lived series Visionaries: Knights of the Magical Light.

Among many other television series and films, he has also lent his basso voice to many film trailers and television commercials, including announcing for the Toonami and You Are Here blocks on the Cartoon Network.
Cullen spent some of his early professional years in Montreal as a radio announcer/DJ on CKGM; and as a character in a then-popular local television kids show.
He acted the role of a French-Canadian astronaut, along with writer and his partner on the show, Ted Ziegler.
Both Ziegler and Cullen were in the supporting cast of The Sonny & Cher Comedy Hour, as well as other network comedies of the era.

He voiced Nintendo's mascot Mario in the Donkey Kong segments on Saturday Supercade, making him the first person to ever provide a voice for the character in western media.

Cullen has done voicework on drum and bass DJ Dieselboy's 2004 album, The Dungeonmaster's Guide, and narration on the 2013 album Tetragrammaton by the Dutch extreme metal band The Monolith Deathcult.
Tetragrammaton also featured Cullen on bass in "God's Among Insects."
Additionally, he did voicework for the unreleased Blizzard Entertainment game Warcraft Adventures: Lord of the Clans, and provided narration for the Star Wars fan film series I.M.P.S.: The Relentless.

Cullen is a voice announcer on Police Story 4: First Strike in advertisements for New Line Cinema, lending his experience as an ex-cop for the Santa Monica division to the cast.
In the 1980s and 1990s, Cullen appeared on a number of television shows. He has played Coran, Stride the Tiger Fighter, and King Alfor in the Lion Voltron series, the transforming spaceship/robot Ramrod, the heroic Commander Eagle and the villainous Nemesis in the 1980s anime series Saber Rider and the Star Sheriffs, Commander James Hawkins in the Vehicle Voltron series, Eeyore in the Winnie the Pooh franchise, Original First Voice of KARR in Knight Rider, Antor and Bomba, and Gunner, in Dino-Riders, Airbourne, Nemesis Enforcer and Zandar in G.I. Joe, He played Mantor/Mantys in Coleco's 5 episode mini-series Sectaurs in 1986; Red Skull in the 1981 cartoon series of Spider-Man, Klaar and Zanzoar in Megas XLR and Mantus in The Pirates of Dark Water. He also had a voice part in the 1984 motion picture Gremlins (as a gremlin) and in the first season of the 2008 Knight Rider series, where he reprised his vocal role as KARR (from the original Knight Rider series). He also did voicework in The Greatest Adventure: Stories from the Bible series, notably as Japheth, one of Noah's sons in the "Noah's Ark" episode, and the King of Nineveh in the "Jonah" episode. He was well known by some as the main villain Venger in the animated series of Dungeons and Dragons. He played the evil sorcerer Renwick in the lesser known series Little Wizards and played Cindarr in the short-lived series Visionaries: Knights of the Magical Light.
Among many other television series and films, he has also lent his basso voice to many film trailers and television commercials, including announcing for the Toonami and You Are Here blocks on the Cartoon Network. Cullen spent some of his early professional years in Montreal as a radio announcer/DJ on CKGM; and as a character in a then-popular local television kids show. He acted the role of a French-Canadian astronaut, along with writer and his partner on the show, Ted Ziegler. Both Ziegler and Cullen were in the supporting cast of The Sonny & Cher Comedy Hour, as well as other network comedies of the era.
He voiced Nintendo's mascot Mario in the Donkey Kong segments on Saturday Supercade, making him the first person to ever provide a voice for the character in western media.
Cullen has done voicework on drum and bass DJ Dieselboy's 2004 album, The Dungeonmaster's Guide, and narration on the 2013 album Tetragrammaton by the Dutch extreme metal band The Monolith Deathcult. Tetragrammaton also featured Cullen on bass in "God's Among Insects." Additionally, he did voicework for the unreleased Blizzard Entertainment game Warcraft Adventures: Lord of the Clans, and provided narration for the Star Wars fan film series I.M.P.S.: The Relentless.
Cullen is a voice announcer on Police Story 4: First Strike in advertisements for New Line Cinema, lending his experience as an ex-cop for the Santa Monica division to the cast.
Peter Cullen