The feds get interested in the Addams Family due to Pugsley's ham radio, powered by Uncle Fester, sending out mysterious "coded" messages worldwide. Agent Hollister (George N. Neise) recruits local tradespeople to infiltrate the house like the postman Mr. Briggs (Rolfe Sedan) and the plumber Mr. Conkey (Norman Leavitt). The Addamses become aware that something's not right and call in the feds. Hollister is sent in and he tells Gomez and Morticia it was him that had Briggs and Conkey placed there. Thinking Hollister is part of the ring, they have him detaine ...