Donna, after discovering that Harold has Laura's secret diary, hatches a risky plan with Maddy to steal it from his home. Andy gets some good news about his condition. Cooper and Truman raid One-Eyed Jack's.
Cooper's near-deaf FBI supervisor Gordon Cole arrives with an ominous message from Windom Earle. Cooper contacts MIKE through possessed Michael Gerard. Josie is pressured by the triads. Shelly and Bobby host a welcome home party for Leo.
Maddy prepares to leave Twin Peaks, Leo wants shoes, Norma learns of Nadine's regression, Tojamura reveals his identity to Pete, Cooper arrests Ben Horne for the murder of Laura Palmer only to receive a devastating message from the Giant.
Ben gets a visit from his lawyer, Jerry. Lucy's meddling sister visits her. Norma's judgy mother arrives in Twin Peaks with a shady new husband. Both Bobby and Catherine plan to blackmail Ben. BOB covers his tracks but MIKE is after him.
After the discovery of Maddy's corpse, Cooper attempts to finally identify Laura's real killer using his visions as clues. The Bookhouse Boys and Major Briggs help out. Lucy tries to decide who the father of her baby is.
Major Briggs is missing. Special FBI Agents Denise Bryson and Roger Hardy investigate Cooper's activities at One-Eyed Jack's. Sheriff Truman stands up for him. Cooper learns about the legend of the Black and White Lodge from Hawk.