ट्रिविया

Writer Tom Holland felt that the transformation scene that the public was sold on was not handled properly somewhat. He felt that Director Philippe Mora lingered "too much" on Paul Clemens and not cutting away to see the reaction shots by the other actors in the room which would've made the effect a lot more shocking than it really was.

Paul Clemens (Michael) has described the scene in the kitchen with Logan Ramsey (Edwin) as the most difficult scene to film in his entire career. Ramsey kept going off script and Clemens found it practically impossible not to laugh at his various ad-libs.

Michael's x-rays were actually x-rays of actor Paul Clemens. Strips of metal were applied to Clemens to create the illusion of subcutaneous anomalies.

The film was a lot gorier than the final cut that was shown theatrically due to the MPAA.

The names "Curwin" and "Dexter Ward" are characters from the horror novel "The Case of Charles Dexter Ward" by Howard Phillips "H.P." Lovecraft.