Watch Grimm S02e18 -

Grimm Season 2, Episode 18: Volcanis - Fangs For The Fantasy

In Season 2, Episode 18 of , titled " Volcanalis " (originally known as "Ring of Fire"), the supernatural procedural takes a literal turn into the volcanic. While detective Hank Griffin is away on "vacation"—a plot point written in because actor Russell Hornsby was recovering from an Achilles tendon injury—Nick Burkhardt and Captain Renard must team up to stop a fiery ancient threat. Episode Plot Summary Watch Grimm S02E18

The killer is revealed to be Volcanalis , an ancient, non-Wesen fiery entity that protects sacred volcanic rocks. It is powerful enough to have been blamed for the destruction of Pompeii. Grimm Season 2, Episode 18: Volcanis - Fangs

The episode follows the investigation of a geologist who is "cooked from the inside out" after taking rock samples from Mount Hood. It is powerful enough to have been blamed

Nick, Monroe, and Captain Renard lure the creature to a warehouse where they use liquid nitrogen to freeze it solid, allowing a vengeful witness to shatter it with a sledgehammer.