Sam enlists Harry the Hat to help win the latest war of practical jokes between Cheers and Gary's Old Towne Tavern.

Jerry gets a date with a woman but has trouble remembering her name. He discovers that it rhymes with a female body part and with the help of George; they come up with Mulva, Bovary, and Arethra as possible names. Elaine visits an old friend who is in the hospital for an operation and lets Kramer and Jerry watch the operation. While watching, Jerry and Kramer cause a junior mint mishap.