Wagon Train was one of my favorite shows as a kid in the late 50s-early 60s. I don't remember this particular episode when it aired, but I have heard about the spanking scene which Erica referred to and have seen some stills of it. Here's a link to a synopsis with stills from that episode. The spanking is shown at the bottom of the page.
http://www.fiftiesweb.com/wt/maggie-hamilton.htm