The Dick Van Dyke Show

I'd Rather Be Bald Than Have No Head at All (3x31)

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Another classic; in this episode, Rob finds a hair or two in his brush; of course he assumes he's going bald. His barber (Ned Glass) tells him to use a concoction on his head, right before bed. The fact that it smells alot like salad dressing has an interesting effect on Rob's dreams that night.