Who’s Sven Gunderson, The Wesen Who Leaves Victims Frozen on ‘Grimm’?

On Grimm, Nick and Hank investigate “a chilling string of murders committed by a rare Wesen with the ability to leave its victims frozen solid.” That big bulging blue creature is Sven Gunderson.

Gunderson is portrayed by actor Matt Keeslar. He’s best known as The Middleman on the TV series The Middleman (based on the graphic novels by Javier Grill-Marxuach and Les McClaine), and for his roles in films including Waiting for Guffman, Mr. Magoo, The Last Days of Disco, and Scream 3. Grimm airs Fridays at 8pm on NBC.