The professor experiments on his pet octapotpmus giving it an insatiable appetite causing it to grow, climb to the top of the lighthouse, and disrupt the Brentwoods' dinner party.
Bill finds himself with a date after calling a 976 phone number and his brothers accompany him on the date where they put on an unforgettable floor show at the restaurant.
The boys are forced to confront Dr. Shrimpster an evil shark man, created by one of the Professor's inventions designed to meld two creatures into one.