Sean Calder, Michael Golamco, and Thomas Ian Griffith Guest Stars: Daniel Roebuck as Peter Orson (returning from Season 1) Gideon Emery as Damien Barso (The Excandesco) Alexis Denisof as Viktor Beckendorf Critical Reception and Ratings

🛡️ Their relationship is tested by Orson's presence, highlighting Rosalee's role as a progressive mediator in Wesen society. Cast and Production Director: Norberto Barba

To stop the Excandesco, Nick recruits Peter Orson ( IMDb ), a former arson investigator and Bauerschwein who Nick arrested in Season 1 for murder.

The team uses a specialized cooling ointment from the spice shop to "extinguish" the Excandesco, causing him to explode. Orson willingly returns to prison afterward. Significant Character Developments

Episode Overview: "Trial by Fire" (Grimm S4E13) The 13th episode of Grimm 's fourth season, " Trial by Fire ," originally aired on February 13, 2015. It is a pivotal chapter that balances a high-stakes "Wesen of the Week" case with major shifts in the series' long-term supernatural dynamics, specifically involving Juliette’s transformation and a long-standing Wesen blood feud. Key Plot Summary

⚔️ The episode features a fan-favorite "knock-down, drag-out" fight between Juliette and Adalind, marking the first time Juliette fully embraces her powers for combat ( TV Fanatic ).

🔥 After a brutal physical fight with Adalind at her home, Juliette finally reveals her new Hexenbiest form to Nick in the episode’s closing moments.

The arsonist is identified as an Excandesco ( Grimm Wiki ), a rare, phoenix-like Wesen capable of internal combustion.