On the Loose is a 1951 American drama film directed by Charles Lederer and starring Joan Evans, Melvyn Douglas, Lynn Bari, Robert Arthur and Hugh O'Brian. The screenplay was written by Evans' parents Dale Eunson and Katherine Albert from a story by Malvin Wald and Collier Young. The film was produced by Young for Ida Lupino's company The Filmakers and distributed by RKO Pictures. Its world premiere was held on October 12, 1951.