RON FREHM / Invision/AP 1 / 2
RON FREHM / Invision/AP 1 / 2

LOS ANGELES -- Robert Culp, the versatile actor who teamed with Bill Cosby in the groundbreaking comedy-adventure TV series "I Spy," has died. He was 79.

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The actor's agent Hillard Elkins says Culp died after collapsing Wednesday on a sidewalk outside his Hollywood home. Los Angeles police say he hit his head while on a walk and was pronounced dead after arriving at a hospital.

A preliminary investigation found that his death is accidental.

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"I Spy," which aired from 1965 to 1968, was a television milestone. Its combination of humor and adventure broke new ground, and it was the first integrated television show to feature a black actor in a starring role.