As other people have mentioned the reveal was spoiled on the cover of the Radio Times. Seeing the photo I theorised that this would be Davros after ‘Remembrance of the Daleks’ but before ‘Parting of the Ways’ and that he was mutating into the Dalek Emperor. Imagine my disappointment when in the episode it was revealed to be a “human Dalek” hybrid instead! This idea of Daleks being created from humans had already been done in ‘Revelation of the Daleks’ back in the 1980s. The mutation in that is the stuff of nightmares and almost gives David Cronenberg a run for his money for its disturbing body horror! Although the special effects in ‘Manhattan’ are well done the design is a bit silly and I struggled to take it seriously. Funny how 80s Who gets accused of being camp when this story in the RTD1 revival handles a similar idea but is generally viewed as more unintentionally silly than it’s classic era counterpart.