No director. No leading lady. No problem. If no one will work with hambitious actor Jack Carson (played by good-natured Carson), hell just pull his own movie together. Good buddy Dennis Morgan can be hoodwinked into costarring. And there's a talented kid in the studio commissary eager for her big break. In her third film (and third with Carson), Doris Day plays that up-and-comer in a bright filmmaking spoof featuring melodic toe-tappers, real Hollywood and Warner Bros. Backlot locales, star cameos (Gary Cooper, Joan Crawford, Edward G. Robinson and more send up their screen personas) and a nifty wink-nudge surprise of a comedy finale. We think the kid has the stuff to go far.