The Dick Van Dyke Show S02E20 - It May Look Like a Walnut!

Rob enjoys a scary sci-fi movie on TV while Laura cowers under the bed covers so as to not hear it. When the show ends, Rob further tortures Laura by telling the tale of Kolak, a visitor from the planet Twilo who resembles Danny Thomas and deploys walnuts to steal Earthlings' thumbs and imaginations. Rob awakes in the morning to a living room strewn with walnuts and Laura preparing scrambled walnuts for Rob's breakfast. Everyone at the office is acting as if Kolak really existed. Is Rob dreaming or is Laura having her revenge?