Siobhan Thompson, Dimension 20's guide into the cursed catacombs of knowledge, leads the hosts in exploring the concept of tombs, discussing Copernicus' remains, speculating on a particle's identity, uncovering tomb hoaxes and fake artifacts, and exploring nature's adaptations after the Chernobyl disaster.

Siobhan Thompson and Zac Oyama join the Band of Boobs in a chaotic battle against impending apocalypse, navigating through cataclysmic events, dangerous tunnels, and breaking chains to save the city. Moonshine bravely uses acid spores, Bev struggles in a tidal wave, and the group reunites with familiar faces after a thrilling journey.