Grandpa says "Simpson genes" are behind Lisa's sudden lack of brain power; Jasper tries to live for the future in the Kwik-E-Mart freezer.

When Homer comes up with a not so bright idea at work involving a donut and the nuclear core, Mr. Burns fires him. He then decides to join the Naval Reserve when Lisa tells him that she would be proud of him if he did. Later a nuclear-sub captain puts naval reservist Homer in command during war games. Blackboard: "My butt does not deserve a website".