After investigating a strange cluster of female deaths and disappearances, Nick (David Giuntoli) sends Monroe (Silas Weir Mitchell) undercover to get a whiff of a hypnotic suspect. In the meantime, a stranger shows up looking to avenge the death of his friend at the hands of a Grimm, but he’ll have to get past Captain Renard (Sasha Roiz). Russell Hornsby, Bitsie Tulloch and Reggie Lee also star.
Nick (David Giuntoli) and Hank (Russell Hornsby) investigate a dangerous female suspect (guest star Jacqueline Toboni) leaving a trail of Wesen in her wake. Elsewhere, Adalind (Claire Coffee) takes measures into her own hands, even if that means forging a dangerous alliance.
A wealthy mobster sets three young men on a quest to win his daughter Elena's (guest star Madeline Zima) hand in marriage and earn his fortune. As they work toward accomplishing their task, bodies start to pile up and Nick (David Giuntoli) and Hank (Russell Hornsby) are on the case. Meanwhile, Adalind (Claire Coffee) and Nick try to adjust to home life but a surprise visitor shakes things up.
On the heels of a shocking discovery, Nick (David Giuntoli) is hell bent on getting revenge and taking the fight to the Royals with help from Trubel (guest star Jacqueline Toboni). Meanwhile, Juliette's (Bitsie Tulloch) alliance continues to lead her down a dark path.
The justification for Nick (David Giuntoli) to become a Grimm again is made much clearer in the wake of the most recent attack against Monroe (Silas Weir Mitchell) and Rosalee (Bree Turner). At work, Nick and Hank (Russell Hornsby) are called to a stretch of highway that acts as a staging area for a horrifying Wesen ritual. In Vienna, Viktor (guest star Alexis Denisof) meets with a completely broken Adalind (Claire Coffee), now ready to be of assistance in finding and retrieving the baby. Meanwhile, Trubel (guest star Jacqueline Toboni) is surprised by the sudden arrival of an old friend.
