1 (9 inch) graham cracker crust
1 pkg. Knox unflavored gelatin
1 can sweetened condensed milk
1/2 pt. sour cream
1 (21 oz.) can blueberry pie filling
1/4 c. water
1/3 c. lemon juice

Heat 1/4 cup water to boil and dissolve gelatin. In bowl, pour sweetened condensed milk, gelatin, sour cream and 1 1/4 cups pie filling. Mix together. Pour in pie crust. Refrigerate at least one hour. Spread remaining pie filling on top. May serve with Cool Whip.