Gary Graham, ‘Alien Nation’ and ‘Star Trek: Enterprise’ Actor, Dies at 73

Gary Graham, a veteran actor best known for portraying Ambassador Soval on the television show “Star Trek: Enterprise” and the detective Matthew Sikes in the “Alien Nation” franchise, died on Monday at his home in Spokane Valley, Wash. He was 73.

His death was confirmed by his wife, Becky Graham, who said the cause was cardiac arrest.

After studying pre-med at the University of California, Irvine, Mr. Graham’s first credited role came in 1976, when he appeared in an episode of “The Quest,” a western series starring Kurt Russell and Tim Matheson. That role led to appearances in “Starsky and Hutch,” “The Incredible Hulk,” “The Dukes of Hazzard” and other television series.

His first regular role in a series was in the “Alien Nation” franchise, which began as a 1988 film starring Terence Stamp, Mandy Patinkin and James Caan. In 1989, Fox adapted it as a television show about extraterrestrials adjusting to life in Los Angeles and trying to blend in. Mr. Graham was cast as Matthew Sikes, the human detective whom Mr. Caan had played in the film. He was paired with Eric Pierpoint as George Francisco, a “Newcomer,” as members of the alien species were called.

The show ran for only one season, but it was rebooted for multiple television movies, including “Alien Nation: Dark Horizon” in 1994 and “Alien Nation: Body and Soul” in 1995.

Mr. Graham also played Soval, a Vulcan ambassador to Earth, in 12 episodes of “Star Trek: Enterprise,” which served as a prequel to the original series. It wasn’t Mr. Graham’s first experience with the “Star Trek” franchise. He had also played Tanis, a member of the Ocampa species, in an episode of “Star Trek: Voyager.”

As with other notable portrayals of Vulcans, such as Leonard Nimoy’s Spock, Mr. Graham skillfully depicted a race practiced in suppressing emotion and employing logic as a primary driver of life.

After “Enterprise,” Mr. Graham took part in unofficial “Star Trek” fan-produced projects, including the 2007 film “Star Trek: Of Gods And Men.”

Gary Rand Graham was born in Long Beach, Calif., on June 7, 1950, and grew up in Anaheim, Calif. His father, Ralph Graham, was a surgeon, and his mother, Rosemary (Taggert), was a homemaker.

Mr. Graham’s marriages to Susan Lavelle and Diane Graham ended in divorce. In addition to his wife, Mr. Graham is survived by a daughter from his marriage to Ms. Lavelle, Haylee Graham; his sisters, Colleen Bertucci and Jeannine Michele Graham; and two stepchildren from his marriage to Ms. Graham, Scott and Steve Deer.