Episode 77: Where There Is Smoke, There Is Hippies.

The Magic Police deal with the ramifications that they have killed a Doppelgänger and that the real Black Spider is still out there somewhere. After interrogating their loved ones and allies to ensure no more Doppelgängers, the Magic Police head to the ruins of Thunder Tree, a known lair of an ancient green dragon, to recover the keys to the Vault of Spells but encounter some unlikely residents among the ruins.