Consumed with guilt after running over a chipmunk, Dick becomes an animal rights activist, forcing his views on Albright and the family. Tommy writes a letter to an advice columnist after neglecting to ask August to the Spring Dance.

Penny Barnes, a young woman obsessed with Superman discovers that he is Jimmy Olsen! Seduced by her beauty, Jimmy ends up not telling her the truth, and when her boss thinks that she is Superman's girlfriend, he kidnaps her and forces Superman to reactivate "the annihilator", a deadly weapon the government had scrapped before it was completely built.

It's St. Patrick's Day in Springfield and the Simpsons go to the parade, while there Bart accidentally gets drunk, and the whole town sees him inebriated on television. The town starts pushing for prohibition, but it is discovered that there is already an old law that prohibits drinking, under punishment of catapult. With the old law back in place, organized crime starts supplying alcohol. Wiggum becomes the scapegoat for this and is fired. Rex Banner is brought in as his replacement and he stops any alcohol from entering Springfield. Homer and Bart come up with an idea to profit off the situation. They take some hidden beer supplies and begin selling it to bars and Homer becomes the "Beer Baron" and Marge is impressed. When his supply runs out, Homer starts making his own liquor in the basement. Marge is not crazy about this new strategy, meanwhile Rex Banner can't seem to find the mysterious "Beer Baron". With no job, Wiggum has fallen on hard times. Because it is so hard to keep the alcohol supply up, Homer decides to turn himself in to Wiggum. Rex Banner plans on catapulting Homer, who gets away scot-free when it is revealed that the old law is invalid. The town instead catapults Rex Banner, and reinstates Wiggum.

While celebrating Scully's 33rd birthday, a strange woman informs Mulder that NICAP member Max Fenig (see Fallen Angel) has recently died in a plane crash. After a visit to the crash site and finding Max's body with radiation burns on it, Mulder suggests that the plane was intercepted by a UFO and is rapidly being covered up by the military.