In 1982, Stringfellow served as a test pilot for Airwolf during its development program. As he was one of several pilots to fly Airwolf, the Firm recruited him to recover Airwolf after its designer, Doctor Charles Henry Moffet, absconded with it and took it to Libya. With the assistance of Dominic Santini, Hawke recovered Airwolf. Upon returning to the United States, the Firm failed to provide Stringfellow with new information regarding St. John. In retaliation, Hawke and Santini hid Airwolf, vowing not to return it until St. John was found. In return for protection from the government, Stringfellow piloted Airwolf on national security missions for the Firm. In the first episode of Season 4, Stringfellow was gravely wounded by an explosion, but was carried from the hospital (with an unknown outcome) by his recently returned brother, St. John.