About mid-way through the new version of The Mummy, the audience is introduced to the Prodigium, the organization led by Russell Crowe's Dr. Jekyll which exists to deal with the evil and monsters of the world. It's the major world building sequence that will likely be used to help tie the Dark Universe movies together going forward. Eventually, however, things go south as Jekyll transforms into Mr. Hyde, the building goes into lockdown to protect itself from Hyde, but Tom Cruise's character of Nick Morton ends up on the wrong side of the door and a fight begins. Annabelle Wallis' Jenny Halsey tries to get back into the room to help Morton, but one of the Prodigium's other members repeatedly tries to stop her so she won't get hurt. At one point, to fight him off, Halsey grabs a large book off a shelf and hits the guy with it, before dropping it to the ground. The book will look familiar to fans of the 1999 flick The Mummy.