Now that we've completely hijacked this thread.
The girl who played Wayne's daughter in McLintock was Stephanie Powers. She was in an old black and white film with Glenn Ford, Ross Martin - from Wild Wild West and Lee Remick - who was Jack Lemon's wife in The Days of Wine and Roses.
The film is titled Experiment in Terror about a woman who works at a bank and is being coerced into stealing money. This film put Ross Martin on the map as an actor.
It's a little dated now, but chilling. Back when they could make a film that scared the bejeebers out of you without all the cursing and the body count of 128.