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Wally (Tony Dow) is looking forward to wearing his best gray suit to an upcoming dance. Unfortunately, Beaver (Jerry Mathers) comes home from fishing and hangs up his coat, with pockets stuffed full of dead minnows, next to Wally's. In their efforts to eradicate the fishy aroma and the oily stain, Beaver and Richard (Richard Correll) make matters worse by attempting to remove the stain with bleach. To top it all off, Eddie Haskell (Ken Osmond) figures out what has happened, and decides to blackmail poor Beav!