In a small bowl, combine wafer crumbs and sugar; stir in butter. Press onto the bottom and up the sides of a lightly greased 11-inch tart pan with removable bottom. Place pan on a baking sheet. Bake at 350 degrees for 8–10 minutes or until lightly browned. Cool on a wire rack.
In a microwave safe bowl, melt butter and chocolate; stir until smooth. Cool for 10 minutes. In a large mixing bowl, beat the eggs, sugar, vanilla and salt until thickened, about 4 minutes. Blend in chocolate mixture. Add the flour and mix well.
Pour into crust; spread evenly. Bake at 350 degrees for 25–30 minutes or until a toothpick inserted near the center comes out clean. Cool completely on a wire rack.
Spread pie filling over the top. In a small microwave safe bowl, combine chocolate and cream. Microwave on high for 20–30 seconds or until chocolate is melted; stir until smooth. Cool for 5 minutes, stirring occasionally. Drizzle over tart. Chill until set.