Kelman's first appearances were in 1954 and 1955 as a choirboy on
The Red Skelton Hour. He had an uncredited role in the 1955 film
A Man Called Peter, based on the life of
Peter Marshall, the
Presbyterian pastor who was twice appointed
chaplain of the
U.S. Senate. In 1957, he portrayed Jimmy Logan in "Bentley and the Baby Sitter" on CBS's then-new sitcom,
Bachelor Father, starring
John Forsythe. In 1957, Kelman played "Elmer" in the final
Ma and Pa Kettle film, ''
The Kettles on Old MacDonald's Farm'', the last screen role for
Marjorie Main. Her co-star was
Parker Fennelly, however, not
Percy Kilbride. On January 2, 1958, Kelman was Norman Fisher in the episode "The Big Jade" of NBC's pioneering police drama,
Dragnet, starring
Jack Webb. From 1958 to 1959, young Kelman played Homer Foley in three episodes of the NBC children's
western series,
Buckskin, with
Tommy Nolan and
Sally Brophy, as a son and his widowed mother living in a hotel in a small fictitious
Montana community. In 1958, Kelman appeared in "The Unfamiliar" on
Ronald W. Reagan's CBS
anthology series,
General Electric Theater. In the 1960 season premiere of the ABC/
Warner Brothers detective series,
77 Sunset Strip, the then 10-year-old Kelman appeared as Randolph in the episode "Attic", set in a remote mountain hideout. The episode stars
Roger Smith as Jeff Spencer and features
Kathleen Crowley,
Cynthia Pepper,
Lee Van Cleef, and
Gary Vinson. He appeared in 1961 on NBC's
Bonanza, with
Lorne Greene, in the episodes "Many Faces of Gideon Flinch" and "The Infernal Machine." In 1961, Kelman was cast in conflicting roles as John and Oliver Hadley in the episodes "The Bully" and "The Sissy", respectively, of NBC's
National Velvet family drama series, starring
Lori Martin as the teenaged equestrian Velvet Brown. On December 7, 1961, he was cast as "Butch" in the episode "The Fabulous O'Hara" of ABC's sitcom,
The Donna Reed Show. In 1961 and 1962, he appeared twice on CBS's
Gunsmoke with
Andy Clyde and
James Arness. In 1962, he played the youthful Alex in the episode "
Young Man's Fancy" of CBS's
The Twilight Zone, co-starring with
Phyllis Thaxter. Kelman appeared on CBS's
Lassie in 1959 and twice in 1965. In 1965, he guest starred as well on the ABC sitcom ''
The Farmer's Daughter'', starring
William Windom and
Inger Stevens. ==Young adult roles==