Deadly attacks on scientists lead Nick, Hank and Wu on an investigation unlike any they have had before. Meanwhile, as the research continues into the origins of the cloth, Monroe and Rosalee learn that Eve is feeling the aftereffects of the death grip. Elsewhere, Capt. Renard reaches out to an old friend to get answers to the origins of the symbols drawn by Diana.

Cast: David Giuntoli, Russell Hornsby, Elizabeth Tulloch, Silas Weir Mitchell, Sasha Roiz, Reggie Lee, Bree Turner, P.E. Ingraham, Alla Korot, Blaine Palmer, Vik Sahay, Dinora Walcott