Janus Films ; Black Sand Productions presents ; a film by Robert Epstein and Richard Schmiechen ; produced by Richard Schmiechen ; directed by Robert Epstein ; narration writers, Judith Coburn and Carter Wilson ; a production of Robert Epstein & Richard Schmiechen and the Television Laboratory at WNET/Thirteen
Warner Bros. Pictures Inc. present ; a Warner Bros. picture ; directed by William Dieterle ; screenplay by Norman Reilly Raine, Heinz Herald, Geza Herczeg ; story by Heinz Herald and Geza Herczeg