According to the Associated Press, Robert Culp, who played FBI Agent Bill Maxwell on The Greatest American Hero, died yesterday falling on a sidewalk near the lower entrance to Runyon Canyon Park, a popular hiking area in Hollywood. According to his manager Hillard Elkins, Culp was on a walk when he fell, and was pronounced dead before noon. Culp’s son was told that he died of a heart attack, and police were not sure if the fall was medically related.

Robert Culp is also known for playing Kelly Robinson in the television show I Spy, which ran 1965-168. For all three seasons, he was nominated for an Emmy for Best Actor in a Drama, but lost to costar Bill Cosby (who played Alexander Scott) all three times. They remained friends after the series ended. Then they had a mini reunion in 1987 for an episode on The Cosby Show. Culp played Cliff Huxtable’s old navy buddy, Scotty Kelly, which was a combination of their I Spy characters’ names.