The episode was written by series creators David Greenwalt and Jim Kouf and was directed by Norberto Barba.
Nick (David Giuntoli) and Monroe (Silas Weir Mitchell) fall into the catacombs of an ancient church in the Schwarzwald in Germany,[1] where they find a small brass chest.
While visiting the spice shop Adalind (Claire Coffee) is threatened by Rosalee's (Bree Turner) ex, Tony, causing her Hexenbiest powers to return.
Tipped by Black Claw to the whereabouts of the Marwan, Renard (Sasha Roiz) tracks him and kills him during a fight.
Nick and Monroe arrive at the spice shop and open the chest with Rosalee, Hank (Russell Hornsby), and Wu (Reggie Lee) present, finding an old shard of wood wrapped in a cloth.
It was also announced that Mayor of Portland Charlie Hales had declared officially November 10 as the "Grimm day.
"[2] The episode was viewed by 3.91 million people, earning a 0.9/3 in the 18-49 rating demographics on the Nielson ratings scale, ranking third on its timeslot and ninth for the night in the 18-49 demographics, behind Dateline NBC, Dr. Ken, The Amazing Race, 20/20, Last Man Standing, Hawaii Five-0, Blue Bloods, and Shark Tank.
But what was it that the seven Grimm knights thought was so important or dangerous or valuable that they hid in a mausoleum in the middle of the Black Forest?
From Nick and Monroe dodging danger and finding a less-than-expected treasure, to Adalind's startling discovery, this episode was action-packed.
"[9] Christine Horton of Den of Geek wrote, "This week Grimm hit its much talked-about 100th episode, and in the main, it didn't disappoint.