The Biggest Harry Potter Easter Eggs Hidden in Fantastic Beasts: The Crimes of Grindelwald

Polyjuice potion makes an appearance not once, but twice in Crimes of Grindelwald. The first time it's a part of Grindelwald's dastardly plan to escape the clutches of the American Ministry of Magic, when he convinces former Ministry auror Abernathy to drink some and pose as Grindelwald in his cell. The second is during a much more lighthearted scene, when Newt whips some up so he can pose as his brother, Theseus.