In a small bowl, combine the cracker crumbs and butter; coat the bottom of a 9 inch springform pan.
In a large bowl, mix cream cheese and sugar until smooth. Stir in eggs, sour cream, heavy cream, and vanilla. Pour into pan.
Bake for 1 hour and 15 minutes. Turn off oven and let cake remain in closed oven for another 1 hour and 15 minutes. Take out and cool to room temperature. Refrigerate for 3 to 4 hours before serving.
