Part II was written by Thomas Ian Griffith and directed by executive producer Norberto Barba.
Meanwhile, Nick, Meisner and Trubel continue looking for any information regarding Conrad Bonaparte so they can stop the threat that will pose Portland forever.
After Renard's (Sasha Roiz) victory, Nick (David Giuntoli) tells Meisner (Damien Puckler) and Trubel (Jacqueline Toboni) about his offer to join Black Claw.
However, Adalind stops the making out and slaps Renard, causing him to furiously leave the room, being watched by Diana.
Monroe (Silas Weir Mitchell) confronts a group of Black Claw members outside his house and tells Trubel to find their location.
Bonaparte (Shaun Toub) meets with Adalind to discuss her awkwardness with them and to show his power, woges into a Zauberbiest and turns her into stone for a moment.
Nick and Wu decide to take Monroe to the precinct to question Tony (Joseph Kathrein), Rosalee's (Bree Turner) ex-boyfriend and member of Black Claw.
Seeing that now no one can face Black Claw, Nick tells everyone to go to his loft for safety while Trubel cries over Meisner's body.
Opening quote: "All the world is a will to power..." Hank and Wu visit Nick in the cell, who informs them that Renard is responsible for Meisner's death and instructs them to take everyone to his loft for safety.
Outside Monroe's house, Eve kills the Black Claw agents watching over while Rosalee learns that she is pregnant but decides not to tell anyone yet.
In the loft, Eve instructs Monroe and Rosalee to hide any evidence in the spice shop from Black Claw and she, Hank and Wu head to the precinct to stop Nick from being killed by the Wesen.
Nick is placed on the center of the precinct where Bonaparte appears, telling him that he wants the Grimm ancestry book, torturing him with mental hallucination about Kelly.
Yet despite being twice the length of your normal Grimm, it never feels like it’s padded or dragging its feet, and in fact moves at the quickest pace the show's ever set.
Alternatively thrilling and horrifying, it's a worthy cap to an ambitious season, continuing the show's commitment to not be business as usual.
"[10] Kathleen Wiedel from TV Fanatic, gave a 4 star rating out of 5, stating: "The finale as a whole was dramatic and fairly fast-paced.
"[12] MaryAnn Sleasman from TV.com, wrote, "'The Beginning of the End' was a prophetic choice of a title given the precarious state of Grimm's shortened sixth season.
Together, both halves of the breakneck bloodbath served to up the tension of Renard's election victory even higher while also trimming a lot of the extra crap from a series that, underneath all the excess, had good bones and a strong foundation.
Despite its extended length, the episode crammed an awful lot in, yet remained fast paced, keeping the dramatic tension high at all times.