He holds the world record for a guest-starring role in a single series, having been in all of the "Lost in Space" episodes except the original pilot.
He was survived by two grandchildren.
He was the co-star of the Bill Dana show. Much of his banter from that show was used on the robot in Lost in Space.
He was the only cast member of "Lost in Space" (1965) who would not appear at fan-related conventions without being paid. His asking price was $500.
He was the voice and drama coach of Chuck Norris. He "taught him how to speak," by putting his fingers in Norris's mouth, and stretching the mouth wide open. Chuck names him as the only man in the world who could get away with doing that to him...a fact of which he was always proud.
His Broadway debut was in 1942 on the play "Heart of the City".
His father, Sam, got struck by a car and was found dead in 1977.
His only son, Richard, who was 16 at the time, visited the set of "The Third Man" (1959), where the relationship between father and son was reconnected.
His widow, Gertrude Bergman, died in 2008, just 6 years after his death.
Just before his death, Harris was involved in the NBC project of "Lost in Space: The Journey Home" in which the Robinson family may be returning to earth.
Of Russian and Polish descent.
Often brought a large bag of tootsie-roll pops to work for the cast and crew.
Prior to co-starring with Gilbert Roland and Dina Merrill in a movie that was never released, he almost died, while traveling to Cuba. At that time, Fidel Castro was on the verge of staging the coup. His crew were bombed at the airport. By the time filming was completed, Castro was in power as the new dictator, therefore the film was seized.
Received a degree in pharmacology from Fordham University.
Remained good friends with Bill Mumy during and after "Lost in Space" (1965).
Survived by his wife, Gertrude, of 64 years and one son, Richard.
Swapped his New York City accent for a more sophisticated baritone voice, after he watched B-movies.
Until his death, he received 500 letters each month. Having been grateful for the character he played on "Lost in Space" (1965), he answered each and every letter.
Was a Democrat.
Was a frequent guest on the Opie and Anthony radio show