When an old friend of the family catches Carolyn talking to the invisible Captain Gregg, he becomes concerned for her sanity and suggests that she see a psychiatrist. Carolyn agrees. The shrink, in turn, suggests that Carolyn ignore the Captain whenever she "thinks" she sees him; but, when the good doctor arrives for a visit, Daniel gives him a haunting he won't forget, then must undo the deed before he reports Gull Cottage as a psychic hot spot.