Place chocolate chips in the top of a double boiler over simmering water. Stir frequently, scraping down the sides with a rubber spatula to avoid scorching, until chocolate is melted, about 5 minutes.
Take 2/3 cup of the chocolate and place between wax or parchment paper. Roll it very thin until it is the size of a 9-inch pie; cool for 2 minutes in the refrigerator (it should still be flexible). Take off one side of paper and press into the pie crust. Cool further in the refrigerator, about 10 minutes; remove the other side of the parchment/wax paper.
Whip cream cheese, sugar, and vanilla extract together in a bowl; split into 2. Take the first mixture and add peanut butter and 1 cup whipped topping. Place this into the prepared pie crust and cool in the freezer until set, about 1 hour.
Add 2/3 cup of the chocolate mixture and 1 cup whipped topping to the second cream cheese mixture. Place this into the prepared pie crust and cool in the freezer until set, about 1 hour.
Take another 2/3 cup chocolate mixture and place in wax or parchment paper. Roll it thin until it is the size of the pie. Cool for 2 minutes, until solid but flexible. Remove 1 side of the parchment paper and place this over. Shape and place it back into the freezer until firm, about 30 minutes. Remove the other paper.
Top with the remaining whipped topping. Add a little water to any remaining chocolate mixture until you can drizzle it onto the pie; drizzle and serve.