Synchronicity (Grimm)

The episode was viewed by 4.89 million people, earning a 1.4/5 in the 18-49 rating demographics on the Nielson ratings scale, ranking third on its timeslot and second for the night in the 18-49 demographics, behind Last Man Standing, Hawaii Five-0, Blue Bloods, 20/20, and Shark Tank.[1] This was a 15% decrease in viewership from the previous episode, which was watched by 5.71 million viewers with a 1.5/5.[2] This means that 1.4 percent of all households with televisions watched the episode, while 5 percent of all households watching television at that time watched it. With DVR factoring in, the episode was watched by 7.31 million viewers with a 2.3 ratings share in the 18-49 demographics.[3]

"Synchronicity" received positive reviews. The A.V. Club's Kevin McFarland gave the episode a "B" grade and wrote, "One of the reasons Grimm needs its episodic structure is that right now, with only a handful of purely serialized installments, the show doesn't really know how to craft a parcel of plot into a compelling structure. There's some information from the past the audience didn't know, a tidbit about Wesen/Grimm interaction that fills in a gap that never seemed like a giant mystery, but mostly this is just an episode that gets all the pieces back to the one location they need to be in to bounce off each other. It serves that function well, with one of the more memorable confrontation scenes in the history of the series—and it doesn't even feature violence."[4]

Nick McHatton from TV Fanatic, gave a 4.4 star rating out of 5, stating: "It's been three years in the making, but thanks to Grimm Season 3 Episode 17, all sides are beginning to come together in Portland as the royal baby makes her presence known. This installment was incredibly satisfying."[5]

MaryAnn Sleasman from TV.com, wrote, "The two concurrent stories running through this episode are where the hour got its name: 'Synchronicity' is the apparent relationship between two or more events that otherwise have no connection. Monrosalee's nuptial arrangements comes off as quaint and cute, a domestic break in all the running and hiding and slaughtering of Royals, but when you look at it in the context of the rest of this season, their wedding-planning woes are just as high-stakes as Grimm's more intense storylines."[6]