Photo Flash: GRIMM's 'Ring of Fire,' Airing 4/19

On GRIMM's upcoming episode, titled "Ring of Fire," Nick (David Giuntoli) finds himself fighting a wildly different sort of Naturefreak in a desperate attempt to keep a volcano from burying Portland in lava. Meanwhile a pregnant Adalind (Claire Coffee) meets a powerful new ally (guest star Shohreh Aghdashloo) in Europe. Meanwhile, Juliette (Bitsie Tulloch) seeks out help after becoming overwhelmed by the latest side effect of her recovery - multiple memories of Nick showing up everywhere. Russell Hornsby, Silas Weir Mitchell, Sasha Roiz, Reggie Lee and Bree Turner.

"Ring of Fire" airs Friday, April 19 at 9:00 p.m. on NBC. Check out a first look below!