Randy DeRoy Mantooth (September 19, 1945 – July 9, 2026), known professionally as Randolph Mantooth, was an American actor who worked in television, documentaries, theater, and film for more than 50 years. A graduate of the American Academy of Dramatic Arts, he was discovered in New York by a Universal Studios talent agent while performing the lead in the play Philadelphia, Here I Come! After signing with Universal and moving back to California, he slowly built up his resume with work on such dramatic series as Adam-12 (1968); Marcus Welby, M.D. (1969); McCloud (1970), and Alias Smith and Jones (1971). Mantooth portrayed paramedic John Gage in the 1970s medical drama Emergency! and spoke regularly at Firefighter and EMS conferences and symposia across the United States while maintaining an active acting career. He was a spokesperson for both the International Association of Firefighters [IAFF] and the International Association of Fire Chiefs [IAFC] for firefighter health and safety, and was honored over the years with numerous awards and recognition. He appeared in numerous films and television series in lead and supportive roles including miniseries adaptations of Testimony of Two Men (1977) and a starring role as Abraham Kent in The Seekers (1979). Through the 1990s and 2000s, he appeared in daytime soap operas, earning him four Soap Opera Digest Award nominations. He frequently returned to performing in theatrical productions. He served as an associate artist at Jeff Daniels' Purple Rose Theatre. His performances include Mark Kaufman's Evil Little Thoughts, Black Elk Speaks, Carey Crim's Morning after Grace, Lanford Wilson's Rain Dance, and numerous works by Native American playwrights including William S. Yellow Robe Jr.
He Was a Quiet Man
(Dr. Willis)
Fire Serpent
(Dutch Fallon)
Bold Native
(Richard Cranehill)
Emergency!
(John Gage)
Before the Storm
(Bing Tupper)
Terror at London Bridge
(Joe Netz)
Scream of the Bikini
(Ambasador Cartwright)
Marriage: Year One
(Dan)
Price To Pay
(Bert)
The Bravos
(2nd Lt. Lewis)
Agent Red
(Admiral Edwards)
Enemy Action
(Solonsky)
Time Share
(Ken Crandall)
Killer Holiday
(Detective Bodrogi)
Murder, She Wrote
(Raymond Two Crows)
L.A. Law
(Gil Tecowsky)
Ghost Whisperer
China Beach
Alias Smith and Jones
Walker, Texas Ranger
(James Lee Crown)
Charlie's Angels
(Mark Williams)
MacGyver
(Earl Stringer)
Criminal Minds
(Patrick Gless)
Night Gallery
(Elkins (segment "Class of '99"))
Emergency!
(John Gage)
JAG
(Ron Barret)
Baywatch
Adam-12
(John Gage)
The City
Dallas
(Joe Don Ford)
Vega$
McCloud
Under Cover
(Bing Tupper)
Vanished
(Ensign)
Diagnosis: Murder
(Mayor Bill Tremont)
Aloha Paradise
Where Are They Now?
(Self)
Detective School
Diagnosis: Murder
(Randolph Mantooth)
One Life to Live
Sons of Anarchy
(Charlie Horse)
Emergency +4
(Paramedic John Gage (voice))
ER
(Policeman (uncredited))
Promised Land
(Ben Camden)
Sarge
(Corporal Finch)
Owen Marshall: Counselor at Law
(Keith Ryder)
Marcus Welby, M.D.
(Intern)
The Love Boat
(Alan Billingsley)
Adam-12
(Neil Williams)
Operation Petticoat
(Lt. Mike Bender)
The Virginian
(Lt. Dorn)
Battlestar Galactica
(Michael)
The Bold Ones: The Senator
(Lt. Tony Caffey)
Owen Marshall: Counselor at Law
(Lonnie Roth)
Testimony of Two Men
(Father Frank McNulty)
Scene of the Crime
The Seekers
(Abraham Kent)