Worked for a short time as a journalist
Gained acting experience on the stage (including Broadway) in the early 50s; made appearances in "Mister Roberts", "The Wisteria Tree" and "Orpheus Descending", among others
Made his earliest TV appearances in the early 50s on such dramatic anthology series as "Short, Short Drama" and "Montgomery's Summer Stock"
Played Ranger Rod Brown on the CBS science-fiction series "Rod Brown of the Rocket Rangers"
Made feature film debut in a prominent supporting role in "Picnic", based on William Inge's stage play
Landed first romantic lead in "Autumn Leaves" opposite top-billed Joan Crawford
Received top billing for the first time in "The Battle of the Coral Sea"
Starred in the pilot episode of the cult science-fiction anthology series "The Outer Limits"; episode entitled "The Galaxy Being"
Chosen by President John F. Kennedy Jr. to portray him during his wartime years in the biopic "PT 109"
Made recurring appearance as the dastardly cowboy Shame, one of many 'special guest villains' who appeared on ABC's cult TV series "Batman"; in his last appearances on the show, his then-wife Dina Merrill also guest-starred as Calamity Jan
Starred in the NBC TV-movie "The Sunshine Patriot"
Made feature producing, directing and writing debut in "J.W. Coop", in which he also starred in the title role
Began playing occasional second leads or prominent supporting roles in films such as "Three Days of the Condor" opposite Robert Redford
Became involved in "Hollywoodgate" scandal when he accused Columbia Pictures president David Begelman of forging his name to a $10,000 check; Robertson later claimed that he was subsequently unofficially blacklisted in the entertainment industry
Directed his second feature film "The Pilot," in which he also starred
Wrote and directed the stage play "The V.I.P.s"
Played recurring role of Michael Ransom on the nighttime CBS soap opera "Falcon Crest"
Returned to features with roles in "Class", "Star 80" and "Brainstorm"
Began providing voice-overs and making appearances to a large number of TV commercials for AT&T
Acted in the two-character stage play "Love Letters" in both New York (opposite Elaine Stritch) and Michael Learned (in San Francisco)
Hosted a series of six syndicated TV documentary specials titled "Medal of Honor: True Stories of America's Greatest War Heroes"
Returned to feature film-actnig with a role in "Wild Hearts Can't Be Broken"
Cast as Peter Parker's Uncle Ben in "Spider-Man," directed by Sam Raimi
Reprised role of Uncle Ben in "Spider-Man 2"
Made his third film appearance as Uncle Ben in "Spider-Man 3"