Ironically, METV played the 5 best Eddie Haskell appearances on Leave It To Beaver last week. Maybe they knew something. My favorite was when The Beaver was in huge trouble with Wally. Eddie surprisingly bailed The Beaver out of the jam, but made him promise he would never tell anybody about the very nice thing he did.
The episode ends with Mr. Cleaver offering a possible explanation to The Beaver. This episode clearly showed that under that tough facade, there was a kind and understanding side to Eddie that few would ever see. RIP