Waltz contacts Nick, suggesting a "Freidenreden" [sic, meaning "Friedenreden" ("peace talks")] - a temporary truce in order to negotiate - to discuss delivering Ian to him.
I agree with Kevin that 'Love Sick' was one of the best episodes the show has done to date, able to resolve the long-running plot of Adalind Shade while advancing the development of lead characters Nick and Monroe.
It's as if the continued signs of Grimm's survival—first a full-season pickup, then a second season renewal — encouraged David Greenwalt and the writing staff to make it a show that deserved its new lease on life, or to at least take some more chances with the storytelling.
"[3] Nick McHatton from TV Fanatic, gave a 4.5 star rating out of 5, stating: "Grimm expanded the looming danger tonight, peeling back even more of the layers of the Wesen world.
"[4] Shilo Adams from TV Overmind wrote, "Grimm may not have had any major action or chase sequences in 'Cat and Mouse', but it became one of the more exciting installments to date, due heavily to the progress in the storyline and the places we're about to go with it.
Eschewing the in-the-trenches police work for a little history, a great guest performance, and a twisty game of, yes, cat and mouse, the episode felt a little more cinematic than normal, which is a good sign heading forward.
For the longest time, Grimm had been stuck in a certain mode, but recently, it's expanded the scope of what it can do visually and story-wise, something that could launch it from good to great in the upcoming second season.