agents are subdued and tied up. However, when the brakes fail, the overpowered Carolina Cannonball is unable to stop at the junction, and roars onto the railroad mainline, headed straight for Las Vegas. Aware that the atomic power supply is unstable and likely to explode catastrophically, Mack throws orders at the next station to have the vehicle taken out by the Air Force. Meanwhile, the enemy agents break loose, and order Judy, Mack, and Grandpa off the train. The three jump to safety, moments before the Carolina Cannonball is destroyed by Air Force jets. Later, Judy, Mack, and Grandpa give a demonstration to US government officials of a working model of what was the world's "first nuclear-powered streetcar". Cast Judy Canova as herself Andy Clyde as Grandpa Rutherford Canova Ross Elliott as Don Mack Sig Ruman as Stefan Leon Askin as Otto Jack Kruschen as Hogar Frank Wilcox as Professor Emil Sitka as Technician See also List of American films of 1955 External links 1955 films 1955 musical comedy films American science fiction comedy films American musical comedy films Films directed by Charles Lamont American black-and-white films Republic Pictures films 1950s English-language films 1950s American films