Photo Flash: First Look - GRIMM's 'Natural Born Wesen,' Airing 3/15

On GRIMM's upcoming episode, titled "Natural Born Wesen," The Wesen code of honor comes into question when Nick (David Giuntoli), Hank (Russell Hornsby) and Monroe (Silas Weir Mitchell) discover a series of bank robberies with Wesen using true natures as their disguises. Meanwhile, Juliette (Bitsie Tulloch) finds herself tormented by faint, slowly returning memories that cause her to question her mental state. Sasha Roiz, Reggie Lee, Bree Turner and Claire Coffee also star. "Natural Born Wesen" airs March 15 at 9 p.m. on NBC.

Check out a first look below!

Photos by: Scott Green/NBC

Russell Hornsby, David Giuntoli

David Giuntoli

Russell Hornsby

Silas Weir Mitchell

David Giuntoli

Sasha Roiz

Sasha Roiz, David Giuntoli