" He stressed: "We must evacuate this planet immediately." His theoretical belief was that their planet, with seismic disturbances and shifting in orbit dangerously close to the Kryptonian sun, would explode in 30 days or maybe even sooner." Her mission, she explains, is to stop a ruthless chief spy""s smuggling of Air Ministry military secrets out of England to the enemy.His low-budget, independent debut film, a milestone ""splatter"" film, also marked the debut of the ""modern"" zombie film that portrayed zombies as resurrected, cannibalistic ""flesh-eaters"" or ""ghouls.Capra had originally wanted MGM stars Robert Montgomery and Myrna Loy to play the lead roles, but ended up, surprisingly, with top MGM star Gable ""on-loan"" (as punishment for refusing a role opposite Joan Crawford) from the studio.