(1/6/1964) Season 4, Episode 13. After Andy and Helen go exploring in a cave, it collapses behind them. They find another way out, but hear on the radio that Barney has mobilized the town to rescue them. Andy Griffith, Ronny Howard, Don Knotts, Aneta Corsaut, Warren Parker, Roy Engel, Joe Hamilton, Jim Nabors, Betty Lynn, Director: Richard Crenna.
