Merrill's television work spanned from 1953 to 1980. Most of his appearances were in guest-star roles in episodic and
anthology series. Among the programs he appeared in were: •
The 20th Century-Fox Hour (1956) • (Season 1 Episode 8: "Yacht on the High Sea") as Alan Byrnes • (Season 1 Episode 10: "Crack-Up") as David Trask •
Wagon Train (1957) (Season 1 Episode 11: "The Zeke Thomas Story") as Zeke Thomas •
The Jane Wyman Show (1958) (Season 3 Episode 23: "The Last Test") as Dicksen •
Studio 57 (1958) (Season 4 Episode 17: "The Starmaker") •
Studio One (1958) (Season 10 Episode 45: "The Lady Died at Midnight") as Paul Gormay •
Cimarron City (1958) (Season 1 Episode 5: "Medicine Man") as Joshua Newton •
Playhouse 90 • (Season 1 Episode 28: "If You Knew Elizabeth") (1957) as Walter Hubbard • (Season 3 Episode 17: "A Quiet Game of Cards") (1959) as McBurnie • (Season 3 Episode 29: "A Corner of the Garden") (1959) as Louis •
Alcoa Theatre (1959) (Season 2 Episode 17: "The Best Way to Go") as Dick Bowen •
Rawhide (1959) (Season 1 Episode 17: "Incident of Fear in the Streets") as Jed Mason •
Laramie (1959) (Season 1 Episode 14: "The Lonesome Gun") as Ed Farrell •
The Twilight Zone (Episode "
Still Valley" as Confederate soldier Joseph Paradine) •
Alfred Hitchcock Presents • (Season 2 Episode 18: "The Manacled") (1955) as Sergeant Rockwell • (Season 3 Episode 25: "Flight to the East") (1958) as Ted Franklin • (Season 4 Episode 7: "Man with a Problem") (1958) as Carl Adams • (Season 4 Episode 36: "Invitation to an Accident") (1959) as Joseph Pond • (Season 6 Episode 8: "Youth and Beauty") (1960) as Cash Bentley •
Zane Grey Theater • (Season 1 Episode 27: "Badge of Honor") (1957) as Colonel Boyd Nelson • (Season 2 Episode 6: "The Promise") (1957) as Noah Rawlins • (Season 2 Episode 29: "Utopia, Wyoming") (1958) as Luke Cannon • (Season 5 Episode 27: "The Release") (1961) as Ken Kenyon •
General Electric Theater • (Season 6 Episode 28: "God Is My Judge") (1958) as McMasters • (Season 10 Episode 11: "Money and the Minister") (1961) as John Dwight •
Checkmate (1961) (Season 1 Episode 20: "A Matter of Conscience") as Ernie Stone •
Winston Churchill: The Valiant Years (1960-1963) as Narrator •
Ben Casey (1963) (Season 2 Episode 17: "Use Neon for My Epitaph") as Miles Houghton •
Combat! (1963) (Season 1 Episode 30: "The Walking Wounded") as Captain August •
Sam Benedict (1963) (Season 1 Episode 18: "Boiling Point") as Sergeant Bill Merriman •
The Alfred Hitchcock Hour (1963) • (Season 1 Episode 20: "The Paragon") as John Pemberton • (Season 2 Episode 6: "Nothing Ever Happens in Linvale") as Harry Jarvis •
The Outer Limits (1963) (Season 1 Episode 8) as Dr. James Hamilton / Major Roger Brothers •
Branded (1965) • (Season 2 Episode 13: "Romany Roundup: Part 1") as Aaron Shields • (Season 2 Episode 14: "Romany Roundup: Part 2") as Aaron Shields •
Bob Hope Presents the Chrysler Theatre (1965) (Season 3 Episode 8: "The Highest Fall of All") as John Perry •
Voyage to the Bottom of the Sea (1966) (Season 2 Episode 24: "The Menfish") as Park •
The Time Tunnel (1966) (Season 1 Episode 1: "Rendezvous with Yesterday") as Senator Leroy Clark •
Marcus Welby, M.D. (1970) (Season 2 Episode 2: "The Worth of a Man") as Orlando 'Cord' Corday •
Medical Center (1973) (Season 4 Episode 23: "Fatal Memory") as Jason Norman •
Kung Fu (1974) (Season 2 Episode 15: "The Way of Violence Has No Mind") as Dan Hoyle •
Cannon (1976) (Season 5 Episode 18: "Revenge") as Andrew McGill • ''
Movin' On'' • (Season 1 Episode 7: "The Good Life") (1974) as Paul Lorimer • (Season 2 Episode 8: "Prosperity #1") (1975) as Samson •
The American Adventure (narrator, 1972–73) ==Radio appearances==