The film helped make co-star Jean Arthur a prominent leading lady for the rest of the decade and into the 40s - it was the first of her three films for Capra.As he reached out with the bladed gloved hand o kill her, she scalded her left forearm on a steam pipe.As she entered the darkened luggage car, she met up with "Phelps", confirming her conspiratorial partnership with her husband, but then advised against killing Ethan: "Is it such a good idea to kill him?" She warned: "Kittridge is here.Plot SynopsisDay One: (Friday)The film opens with a panning movement along an electrical marquee sign: "MUSIC HALL.Another crystal conveniently brought up a recorded image of Kal-El""s mother Lara (Susannah York), Keeper of the Archives, who told them of "the darkest episode in our planet""s history" - about how Krypton""s three arch-criminals, with the same powers as Superman, were placed in the Phantom Zone to be imprisoned for all eternity.