In his efforts to find out if school principal Mrs. Rayburn really has a spanking machine in her office, Beaver (
Jerry Mathers) gets locked in -- just as school is being dismissed for the weekend. Facing the prospect of two whole days of imprisonment, Beaver sets off an alarm and is rescued by the fire department. Upset by Beaver's unwanted "fame," Ward (
Hugh Beaumont) and June (
Barbara Billingsley) warn him not to make a public spectacle of himself in the future. Without revealing too much more, it can be noted that this is the classic episode in which the Beav gets his head stuck in an iron fence. ~ Hal Erickson, All Movie Guide