In episode 32, Living the Life of the Mind... While Defending Our Moral Clams, the team discuss:
Out of sight, out of mind, out of existence, with Bishop Berkeley (Portrait of a Philosopher);
What kind of morals to expect from the rest of the animal kingdom (That's Where I'd Put My Eggs);
Wittgenstein vs. Popper, the low-hanging fruit fight we somehow haven't yet covered (Philosofights).