Bake pre prepared pie crust in 9" pie plate set aside to cool.
On top of cooled crust, slice bananas and arrange on the bottom of the crust. In a microwave safe bowl combine peanut butter and chocolate, microwave at least 1 to 2 minutes, stir in between and blend until smooth. Distribute over bananas evenly, let cool and set.
In a large bowl whisk milk and pudding mix at least 2 minutes until thickened, let set 2 minutes. Fold in the whole 8 oz. of cool whip, blend thoroughly and spread over chocolate mixture. Refrigerate for a few hours.