in
General Hospital, 1964
Early roles His first
primetime role was in "A Fist of Five", a 1962 episode of
Quinn Martin's
The Untouchables, as a brother of an ex-policeman (played by
Lee Marvin). Later that year he appeared in a small role as a cowboy named "Harry" on James Arness's TV Western
Gunsmoke ("False Front" - S8E15). He appeared on
General Hospital as the "philandering Dr.
Phil Brewer" from 1963 to 1965, which was later described as "Thinnes' big break." In 1964, he guested twice in episodes "Murder by Scandal" and the "Lost Lady Blues" of the 13-episode
CBS drama
The Reporter. Thinnes guest starred on another Quinn Martin series, ''
Twelve O'Clock High'' produced by
20th Century Fox Television, becoming a casualty of war while commanding a
B-17 bomber on a dangerous mission. Later he co-starred as Ben Quick in the short-lived 1965-66 20th Century Fox Television series
The Long Hot Summer, which ran on ABC. During its run he received
The Invaders During 1967 and 1968, Thinnes starred in
The Invaders, a TV series in which he portrayed an architect named David Vincent who accidentally witnessed the arrival of aliens from another planet. Vincent waged a seemingly hopeless one-man campaign against them. The series became a cult classic, leading to other 'aliens vs earthlings' films and TV shows. His then-future second wife, actress
Lynn Loring, appeared in the show's 14th episode,
The Panic.
The Washington Post noted in 2008 that, although
The Invaders "ran for just two seasons ... in 2004, TV Guide placed main character David Vincent at #6 on its 25 Greatest Sci-Fi Legends list." In 2019, American basic-cable network
MeTV began running weekly reruns of
The Invaders as part of its popular "Red-Eye Sci-Fi Saturday Night" overnight late Saturday evening and early Sunday morning
sci-fi TV series programming schedule.
Post-Invaders In another short-lived series, Thinnes had the lead role on
The Psychiatrist as Dr. James Whitman. "Manhunter" (in which Thinnes tracks a bank robbery suspect) is a TV Film that was broadcast on British TV in 1972 (with
The Man Hunter as its title) but was not shown on American TV until 1976. A similar title ("
The Manhunter"), but with a different plot, was used for a 1974-filmed TV movie. He played an intrepid writer and investigator of the supernatural David Norliss in 1973's
The Norliss Tapes, a pilot for an unproduced TV series, and portrayed a suspicious schoolmaster in the TV movie ''
Satan's School for Girls''. He appeared in the disaster films
Airport 1975 as the co-pilot, and
The Hindenburg as a sadistic
SS captain. Thinnes was cast in
Alfred Hitchcock's 1976 film
Family Plot in the role of nefarious jeweler Arthur Adamson when Hitchcock's first choice,
William Devane, was unavailable. Thinnes had already shot several scenes for the film when Devane suddenly became available. Hitchcock fired Thinnes and re-shot all of his scenes. He confronted Hitchcock in a restaurant and asked the director why he was fired. Flabbergasted, Hitchcock simply looked at Thinnes until the actor left. Some shots of Thinnes as the character (from behind) remain in the film. Thinnes appeared in the 1979 miniseries
From Here to Eternity as Captain Dana Holmes. During the 1982–1983 season, Thinnes appeared as Nick Hogan in 35 episodes of
Falcon Crest. He later played Roger Collins in the 1991 revival of TV's
Dark Shadows. He appeared on
One Life to Live as Alex Crown from 1984 to 1985, and as
Sloan Carpenter from 1992 to 1995. He also played a lead role in "The Final Chapter," the first episode of the 1977 series ''
Quinn Martin's Tales of the Unexpected (known in the United Kingdom as Twist in the Tale
), and in "The Crystal Scarab", a first-season episode of Poltergeist: The Legacy in 1996. Thinnes was once considered by Paramount for the part of Jean-Luc Picard in Star Trek: The Next Generation''.{{cite web| url= http://www.lettersofnote.com/2010/08/star-trekcasting.html|title= STAR TREK/Casting He appeared in the 1988 pilot episode of
Law & Order, "
Everybody's Favorite Bagman", as district attorney Alfred Wentworth. By the time the show was picked up in 1990, however, Thinnes was contractually obligated to another TV series (NBC's
remake of
Dark Shadows), and so his character was replaced with district attorney
Adam Schiff, played by
Steven Hill. Thinnes made two appearances in
The X-Files as
Jeremiah Smith, an alien rebel with healing and shape-shifting abilities. Twice Thinnes appeared on the ABC soap opera
One Life to Live playing two different characters. From 1984 to 1985, he played the role of "Alex Crown" and from 1992 to 1995, he played the role of "Gen. Sloan Carpenter". During both of his stints on the show, his characters became a father-in-law to the same character,
Cassie Callison. In 2005, Thinnes co-starred as Dr. Theophile Peyron in the movie
The Eyes of Van Gogh about
Vincent van Gogh (played by Alexander Barnett, who also wrote and directed) and his voluntary stay in an
insane asylum. The movie focuses on Van Gogh's relationships with Dr. Peyron, as well as fellow expressionist
Paul Gauguin, and his brother, Theo. ==Personal life==