Throughout the '50s, '60s and '70s, Hunnicutt made nearly 40 guest appearances on American television programs. He made two memorable appearances on Perry Mason in 1963: he played orange grower Amos Kennesaw Mountain Keller in "The Case of the Golden Oranges," and prospector Sandy Bowen in "The Case of the Drowsy Mosquito." He also made guest appearances on Bonanza, Cheyenne, Gunsmoke, The Outer Limits, The Rifleman, Wanted: Dead or Alive, The Andy Griffith Show, The Wild Wild West, Adam-12, and The Twilight Zone. In one of his last movies, Moonrunners (1975)—the precursor to The Dukes of Hazzard—he played the original Uncle Jesse.