NBC has released the official guide of Grimm season 3 episode 6 "Stories We Tell Our Young". This episode is slated to air on Friday, Dec. 6 at 9PM ET.

A YOUNG BOY'S AILMENTS LEAD EVERYONE TO THINK THEY ARE DEALING WITH A CASE OF DEMON POSSESSION -

• Nick (David Giuntoli) faces his toughest challenge yet when he and Hank (Russell Hornsby) investigate a case that combines religious phenomenon with the dark dealings of the Wesen Council.
• Meanwhile, Rosalee (Bree Turner) is torn when Nick's case challenges her Wesen loyalties.
• Elsewhere, Captain Renard (Sasha Roiz) leaves town to tend to some "family matters."

Bitsie Tulloch, Silas Weir Mitchell, Reggie Lee and Claire Coffee also star.

Source: NBC