Grimm (2011)

S2E19 Endangered

Nick finds himself investigating bizarre cow mutilations and sightings of luminous beings, prompting him to reconsider the possibility of extraterrestrial life in the Wesen realm. During his pursuit, he encounters an unusual UFO specialist who appears to be hiding crucial information. At the same time, Nick continues to unravel the mystery surrounding the key, and Juliette begins to experience a resurgence of romantic memories connected to Nick, bringing their past feelings to the forefront.