NBC has released the stills for Grimm 2×19 “Endangered” as well as the synopses for 2×20 “Kiss of the Muse” and 2×21 “The Waking Dead.”

‘Grimm’ 2×19 “Endangered”

Things take a weird turn for Nick when an alarming number of cow mutilations and sightings of glowing creatures come in. Could it be that aliens exist in the wesen world? A UFO expert meets with Nick but seems to be keeping the truth to himself. At the same time Nick will delve deeper into the key as Juliette begins to remember her romantic memories of Nick.

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‘Grimm’ 2×20 “Kiss of the Muse”

Episode synopsis:
“Nick (David Giuntoli) discovers a muse-like Wesen (guest star Nora Zehetner, “Heroes”) with the ability to influence those she gets close to – some with positive results, others with terrifying ones. Nick must find a way to get close without losing himself in the process. Juliette (Bitsie Tulloch) arranges a dinner date with Nick in the hopes of clearing the air, but their plans go awry as the case intensifies. Meanwhile, Rosalee (Bree Turner) takes her first visit to Aunt Marie’s trailer.”

“Kiss of the Muse” will air May 3 at 9 p.m. on NBC.

‘Grimm’ 2×21 “The Waking Dead”

Episode synopsis:
“ZOMBIES DESCEND ON PORTLAND – JAMES FRAIN AND SHOHREH AGHDASHLOO GUEST STAR –Nick (David Giuntoli) and Hank (Russell Hornsby) discover a new kind of strange when they investigate suspects being found dead – for the second time. In Europe, Adalind (Claire Coffee) finds herself in the middle of a feud between Frau Pech and Stefania (guest star Shohreh Aghdashloo ) while working over the details of her pending transaction. Meanwhile, determined to remember every last detail to get things started once more, Juliette (Bitsie Tulloch) insists Monroe (Silas Weir Mitchell) share with her Nick’s darkest secret – the world of Grimms and Wesen. Sasha Roiz, Reggie Lee and Bree Turner also star.”

“The Waking Dead” will air May 14 at 10 p.m. on NBC.

What do you think will happen in the upcoming episodes of ‘Grimm’?

Photo credit: Scott Green/NBC