Roberts attended Franconia College. He died in a motorcycle accident in 1989. Roberts married Judith Anna LeBrecque on October 15, 1962; they divorced in 1971. He subsequently married Kara Knack in 1972, divorcing in 1996. At the time of his death from pancreatic cancer on January 24, 2010, Roberts was married to Eleanor Criswell. Selected filmography FilmDesire Under the Elms (1958) - Peter CabotThe Sheepman (1958) - Chocktaw NealRide Lonesome (1959) - Sam BooneThe Errand Boy (1961) - Adam Cartwright - Cameo (uncredited)The Silent Gun (1969, TV Movie) - Sam BennerFour Rode Out (1970) - U.S. Marshal RossThe Kashmiri Run (1970) - Gregory NelsonThe Bravos (1972, TV Movie) - Jackson BuckleyAdventures of Nick Carter (1972 TV Movie) - Neal DuncanAssignment: Munich (1972, TV Movie) - C. C. BryanDead Man on the Run (1975, TV Movie) - Brock DillonThe Deadly Tower (1975, TV Movie) - Lieutenant LeeThe Lives of Jenny Dolan (1975, TV Movie) - Camera Shop ProprietorPaco (1976) - PompihoCharlie Cobb: Nice Night for a Hanging (1977 TV Movie) - Sheriff YatesThe Magic of Lassie (1978) - JamisonThe Immigrants (1978, TV Movie) - Anthony CassalaThe Night Rider (1979, TV Movie) - Alex SheridanHot Rod (1979, TV Movie) - Sheriff MarsdenHigh Noon, Part II: The Return of Will Kane (1980, TV Movie) - Marshal J. D. WardIncident at Crestridge (1981, TV Movie) - Mayor HillDesperado (1987, TV Movie) - Marshal DanceyThe Night Train to Kathmandu (1988, TV Movie) - Prof. Harry Hadley-SmithePerry Mason: The Case of the All-Star Assassin (1989, TV Movie) - Thatcher HortonDonor (1990, TV Movie) - Dr. MartingaleCheckered Flag (1990) - Andrew Valiant Partial television creditsBonanza (1959–1965) - Adam CartwrightOne Step Beyond (1959) - Sgt. VaillGunsmoke (1967) - Stranger in Town (as hired killer, Dave Reeves)The Big Valley - 2 episodes, Cage of Eagles as Madigan and Run of the Cat as Ed TannerHawaii Five-O (1971) - The Grandstand Play - as Lon Phillips (pro baseball player)Cannon (1976) 5x18 The House Of Cards as Sid Cleary / Phil Denton Barnaby Jones (1977) - Testament of Power - as Daniel MatthewsMan from Atlantis (1977) - S1/E10 "Shoot-Out At Land's End" - as Clint HollisterVegas (1978–1980) - 3 episodesMannix (TV series) (1973) - “Little Lost Girl” as GeorgeHawkins (TV series) (1974) - “Candidate for Murder"Centennial (1978) - series 1, episodes 4, 5 - as Gen. AsherTrapper John, M.D. (1979–1986) - Trapper John McIntyreThe Love Boat (1980) - The Mallory QuestDiagnosis: