Gidget's (Sally Field) father Professor Russell Lawrence (Don Porter) has gone away to San Fransisco to give a lecture. She's staying with her best friend Larue (Lynette Winter) until she gives her honest opinion of Laure's newly-written mystery story and leaves after an argument. At the airport, Professor Lawrence runs into an old friend, Stew (noted sitcom composer Frank De Vol, "The Brady Bunch", "My Three Sons", "Family Affair"). Thinking his house is empty, the professor offers for the health-conscious out-of-towner to stay there. Gidget nervously returns home to be alone during a storm. Stew comes in soon-after to also be leery of being in the home alone. Gidget and Stew comically miss discovering one another. Stew goes downstairs where his health equipment gives off an eerie hum. He unknowingly leaves behind a rose on the bed, which spooks Gidget into calling for Larue to come over with her story. Meanwhile, the Lawrence's neighbor Fonya (Hollis Irving) sees the lights on inside the house knowing it should be vacant. She's returned from a costume party with her husband Herb (familiar character actor Joseph Mell) who she sends to check on the house dressed as Wolfman. The electricity goes off, adding to the spooky feel of the night. Gidget and Larue, Stew, and Herb (dressed as Wolfman) unknowingly go around the house behind one another to comic effect.
This is an engaging episode full of laughs.