On March 24, 2010, Culp died of a heart attack while on a walk near Runyon Canyon Park. He was 79 years old.

Did Robert Culp and Bill Cosby get along?

Culp and Cosby remained good friends after the series left air. But Culp could be hard on himself, he said — material he channeled into Kelly Robinson. “There are a lot of flaws in Kelly Robinson, much more than you see in the ordinary leading character on a TV show,” he said.

Why was I Spy Cancelled?

The series’ ratings declined in the third season. … He believed that continuing “I Spy” would lessen its syndication value as the series was struggling with creating new ideas. Also, NBC had refused to move the show back to Wednesdays. Culp and Cosby had tired of the series and were relieved that it was cancelled.