Prepare the pie: Place a rack in the center of the oven and preheat the oven to 350 degrees F. Remove the dough from the refrigerator and allow it to warm at room temperature until it becomes flexible enough to roll, 15 to 30 minutes. On a lightly floured work surface, roll the dough into a 12-inch circle. Transfer the dough to a regular (not deep-dish) 9" pie pan that's at least 1 ¼ inches deep. Trim and crimp the edges, then place the crust in the freezer to chill, while you prepare the filling.
Dissolve the espresso powder in 1 tablespoon of the half and half. Sprinkle over the crust mixture. Sprinkle on whiskey. Add up to 3 tablespoons (or more, if necessary) of the half and half to the dry ingredients, pulsing a little after each. Add only as much half and half as you need to for the dough to just hold together when you take a handful. On a lightly floured work surface, pat the dough into an even, flat, 1-inch disk, wrap in plastic, then refrigerate 1 hour or overnight.
Prepare the crust: Dice the butter, then place it in the freezer while you prepare the other ingredients. In the bowl of a food processor fitted with a steel blade (or a medium mixing bowl), place the all purpose flour, whole wheat flour, sugar, and salt, then pulse a few times to combine. (If not using a food processor, stir the ingredients together in a medium bowl). Add the butter pieces, then pulse just until the dough resembles a cobblestone street. Some pieces will be the size of peas, others oatflakes. (Without a food process, work the butter into the dry ingredients with a fork or pastry blender.)