The Wizarding World has grown by leaps and bounds since J.K. Rowling first dropped Harry Potter and the Sorcerer’s Stone on the world, and Fantastic Beasts: The Crimes of Grindelwald adds even more to the Potterverse. The Fantastic Beasts films, starting with the first in the franchise, Fantastic Beasts and Where to Find Them, take place long before Harry Potter arrives on the scene, but include numerous references to future Potter plot points.
The Harry Potter connections in Fantastic Beasts 2 are not just Easter eggs; they actually recontextualize many of the scenes in Sorcerer’s Stone as well as other films in the Harry Potter series. Aside from referencing the previous films, Fantastic Beasts 2 expands the overall mythos of the series. A lot of the following references are for fans who’ve kept up with the series since its inception, but that doesn’t mean first-years won’t have fun with this reference guide to the connections between The Crimes of Grindelwald and the rest of the Harry Potter series.
Polyjuice Potion - When Newt Goes Undercover In The Parisian Ministry Of Magic
Polyjuice potion makes a big comeback in The Crimes of Grindelwald, and it turns out that even the famed Newt Scamander can't get the temperamental potion to stick.
Before popping into the Parisian Ministry of Magic to find Credence's identity, Newt takes a slug of polyjuice potion so he can turn into his brother. Unfortunately, he immediately runs into the person he's impersonating, so it's all for naught. The problem turns out not be a big deal because the potion wears off immediately.
Nagini - At The Parisian Freak Show
Nagini, the giant snake belonging He Who Shall Not Be Named, began her life as a Maledictus, or someone born with a blood curse that causes them to permanently turn into a creature. The audience learns she's kept in a traveling freak show. Credence, who's fallen in love with the snake woman, breaks her out of the freak show.
She sticks with Newt's crew at the finale of the film, so it'll be interesting to see how she ends up around Voldemort's neck.
The Deluminator - When The Freak Show Rolls Out Of Town
Blink and you'll miss it, but when the freak show leaves Paris, the elf employed by the show uses a Deluminator to click out some of the street lights.
Maybe he and Dumbledore shop at the same spots in Diagon Alley.
Professor McGonagall - When The Aurors Stop By Hogwarts
Forget everything you know about the timeline of the Wizarding World, because it turns out that Professor McGonagall is teaching at Hogwarts in 1927. The audience doesn't get a good look at the teacher who was brought to life by Maggie Smith, but you do hear the character's name multiple times.
First, Dumbledore tells his students to "go with Professor McGonagall" when a group of Aurors interrupt his dueling club, and her name is heard again in Leta Lestrange's flashback. Is it the same McGonagall in an altered timeline? Is it her mother? Or has the professor used a time turner?