Dack Rambo

 played Ted Bingham in the Tabitha episode, Tabitha's Triangle (1977).

Biography
Dack Rambo was an American actor. He is best remembered for his role as Walter Brennan's grandson, Jeff Sonnett, in the ABC television series "The Guns of Will Sonnett" (1967-1969) as well as his role as Jack Ewing on the CBS prime time television soap opera "Dallas" (1985-1987).

Born Norman Jay Rambeau, he had a twin brother who pursued an acting career under the name Dirk Rambo. The brothers moved to Los Angeles, California in the 1960s where they were discovered by actress Loretta Young and cast in her CBS series, "The New Loretta Young Show." In February 1967, his brother was killed in a road accident and later that same year, he landed the role of Jeff Sonnett on "The Guns of Will Sonnett" and co-starred in the short-lived "Gunsmoke" spin-off, "Dirty Sally," with actress Jeanette Nolan.

During the 1970s and 1980s, he made guest appearances on numerous television shows, including "Gunsmoke," "Marcus Welby, M.D.," "House Calls," "Wonder Woman," "Sword of Justice," "Charlie's Angels," "All My Children," "Fantasy Island," "The Love Boat," "Hotel," and "Murder, She Wrote."

While working on the soap opera "Another World" in 1991, he learned that he was infected with HIV. He quit the series shortly thereafter and retired from acting. He died of complications from AIDS at the age of 53.

Source
Bjornstad, William. Dack Rambo memorial on Findagrave.com, August 23, 1999. Retrieved on March 1, 2020, edited.