On February 24th, 1969, two days before he turned 37, Johnny Cash led his traveling troupe behind the foreboding walls of the California State Penitentiary at San Quentin, long known as one of America's toughest prisons.

Cast:Johnny Cash, June Carter Cash, Marshall Grant, W.S. Holland, Carl Perkins, Bob Wooton,

Genre:Documentary, Music,

country:United Kingdom,

Production:Granada Television, ITV,