When you watch Grimm Season 4 Episode 13 online, Nick and Hank investigate a deadly fire at a store. They immediately suspect arson, especially since the fire seemed to have a mind of its own. The fire also has similarities to previous incidents, which were investigated by Peter Orson, the Bauerschwein arson investigator who Nick arrested for murdering two Blutbaden as part of the centuries-long cultural feud. Orson freely offers his assistance, wanting to take down the arsonist that had always haunted him. It isn't long before Nick realizes that the arsonist is also an Excandesco, a Wesen capable of producing intensely hot flames from his own skin. The team must discover a way to neutralize the Excandesco's ability without getting burned themselves... and also without re-sparking the Bauerschwein-Blutbaden feud. Meanwhile, Prince Viktor and Adalind continue in their attempts to locate Nick's mother Kelly and the baby, but Adalind is getting impatient and wants to go after Juliette, not yet knowing what has happened to Juliette since Adalind left Portland, or that Nick is a Grimm again. What will happen when Adalind comes face to face with Juliette? Will the team manage to take down the Excandesco before someone else dies? Find out the answers whenyou watch Grimm Season 4 Episode 13 online!