500th Episode. Guests: Dan Savage, Thom Hartmann, Allan Lichtman, Debra Soh, Liz Mair.500th Episode. Guests: Dan Savage, Thom Hartmann, Allan Lichtman, Debra Soh, Liz Mair.500th Episode. Guests: Dan Savage, Thom Hartmann, Allan Lichtman, Debra Soh, Liz Mair.