LOS ANGELES — Richard Anderson, the tall, handsome actor best known for costarring simultaneously in the popular 1970s television shows “The Six Million Dollar Man” and “The Bionic Woman,” has died at age 91.

Anderson died of natural causes Thursday, family spokesman Jonathan Taylor said.

“The Six Million Dollar Man” brought a new wave of supernatural heroes to television. Based on the novel “Cyborg” by Martin Caidin, it starred Lee Majors as U.S. astronaut Steve Austin, who is severely injured in a crash. The government saves his life by rebuilding his body with atom-powered artificial limbs and other parts, giving him superhuman strength, speed and other powers.

Anderson played Oscar Goldman, Majors’ boss at the secret government spy agency the astronaut went to work for after becoming a cyborg.

“Richard became a dear and loyal friend, and I have never met a man like him,” Majors said Thursday, adding that the two first met when they filmed several episodes of another hit television show, the 1960s western “The Big Valley.”

“I called him ‘Old Money.’ His always stylish attire, his class, calmness and knowledge never faltered in his 91 years,” Majors said, adding Anderson was “still the sweet charming man” when they spoke just a few weeks ago.