1. In a large pitcher, combine the Pimm's, the orange and lemon slices, and the mint. Chill for about 10 minutes. Stir in the ginger ale.
2. Put two cucumber wedges, standing on end, into each of four 1-pint glasses. Fill halfway with ice. Pour in the Pimm's mixture. Push the mint down into the drinks and divide the orange, lemon, and apple slices among the drinks.