NBC has released the synopsis for the TWO-HOUR season finale of Grimm, which you can check out below. The installment, titled “Beginning of the End, Parts One and Two,” is officially described as follows:
A DEADLY SHOWDOWN IS ON THE HORIZON AS BLACK CLAW TIGHTENS ITS GRIP ON PORTLAND – SHAUN TOUB, DAMIEN PUCKLER, JACQUELINE TOBONI AND HANNAH R. LOYD GUEST STAR – Black Claw makes a strategic move against Hank (Russell Hornsby) that shocks everyone and sends Nick (David Giuntoli) on a war path. Hadrian’s Wall ramps up their investigation as they seek out a mysterious man named Bonaparte (guest star Shaun Toub). Meanwhile, Adalind (Claire Coffee) and Capt. Renard (Sasha Roiz) must learn to deal with their new and very unpredictable reality with Diana (guest star Hannah R. Loyd). Bitsie Tulloch, Silas Weir Mitchell, Reggie Lee and Bree Turner also star.
Grimm “Beginning of the End, Parts One and Two” airs Friday, May 20, at 8pm on NBC.