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Kemmer made his television debut in 1951 and starred as Buzz Corry in the live television science fiction action-drama Space Patrol (1951-1956).[2] Kemmer made his film debut in 1956 (Behind the High Wall). He had a starring role as a pilot in the film The Hot Angel (1958), but his big-screen work was mostly small roles in low-budget B movies such as Giant from the Unknown (1958). The bulk of Kemmer's work was for the small screen.
After Space Patrol, Kemmer was a guest star in various prime-time television series, including the classic Twilight Zone episode "Nightmare at 20,000 Feet", in which former space hero Kemmer co-starred with future space hero William Shatner. He also made two guest appearances on Perry Mason. In 1960 he played Roger Porter in "The Case of the Frantic Flyer," and in 1961 he played murder victim Leslie Hall in "The Case of the Pathetic Patient."
In 1964 he played a major part in ”The Impostor”, a tense Sutton Roley-directed episode of Combat! (S3, E10).
Kemmer starred for two years as an American astronaut in the soap operaThe Clear Horizon,[3] leading to the later phase of his career as a leading player in various daytime drama series, including The Edge of Night (on which he met his wife, actress Fran Sharon) as Malcolm Thomas, The Secret Storm as Paul Britton #2, As the World Turns as attorney Dick Martin, and
Somerset as attorney Ben Grant. He also made appearances as a doctor on All My Children.
^Terrace, Vincent (2011). Encyclopedia of Television Shows, 1925 through 2010 (2nd ed.). Jefferson, N.C.: McFarland & Company, Inc., Publishers. p. 999. ISBN978-0-7864-6477-7.
