Love Letters on the Rocks.Jealous Fred's discovery of a love poem that was sent to Wilma prompts him to hire Bedrock's top detective, Perry Gunnite (a parody of Peter Gunn), to find out who the home-wrecking poet is. When Gunnite's investigation mistakenly points to Barney, Fred plans revenge against his friend until Wilma reminds her husband that he had written the poem himself many years earlier during their courtship.