In December 1959, at the age of 15, Grady appeared in two different episodes of CBS's "Dick Powell's Zane Grey Theatre", having played opposite Joan Crawford and Dick Powell. In "Rebel Ranger", he was cast as Rob Faring, the young son of Crawford's character, Stella Faring, a Confederate widow who tries to reclaim her former home and Rob's birthplace from the Unionist owner, Cass Taggart, played by Scott Forbes. Character actor John Anderson is cast as Fisk Madden, who tries to drive Taggart off his land and gain Stella's favor. The episode ends with Stella and Rob heading into a nearby town with the understanding that Taggart would call upon Stella for possible courtship, even though Crawford was fifteen years Forbes' senior. Stella Faring reveals that she had been living in San Antonio, Texas, during the war, also the birthplace of Joan Crawford.