After signing with Universal and moving to California, he slowly built up his resume with work on such dramatic series as Adam-12 (1968), Marcus Welby, M. (1969), Mc Cloud (1970) and Alias Smith and Jones (1971).
He was chosen to play a lead role as paramedic John Gage in the 1970s medical drama, Emergency!
, (opposite Julie London as Nurse Dixie Mc Call, Bobby Troup as Dr. The show aired six seasons (129 episodes) and six two-hour television movie specials.
Mantooth has spoken regularly at Firefighter and EMS conferences and symposia across the United States, while maintaining an active acting career.
Mantooth's earlier jobs included work as an elevator operator at the Madison Avenue Baptist Church and as a page at NBC Studios at Rockefeller Center in New York City.
In a 2013 interview with the Tolucan Times, Mantooth said of his decades-long colleague, "Julie London was a mentor to all of us.Please improve this biographical article by adding secondary or tertiary sources.Contentious material about living persons that is unsourced or poorly sourced must be removed immediately, especially if potentially libelous or harmful.Randolph Mantooth (born Randy De Roy Mantooth, September 19, 1945), is an American actor who has worked in television, documentaries, theater, and film for more than 40 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.