Meet BEAST, Skills: Genius, Superhuman, Claws…He’s BEAST. Professor X, Magneto, Wolverine and Storm arrive to find mutants hiding in Mongolia, where they plan to send Professor X back to 1973 to stop Mystique from killing Bolivar Trask, which triggered the Sentinel Program. However, Wolverine volunteers to go back due to his regenerative powers, and because Professor X couldn’t physically handle going back decades. As the X-Men hide themselves in a monastery, Wolverine is sent back to the past by Shadowcat after asked by Professor X and Magneto to unite them together.
Wolverine wakes up in 1973 and eventually arrives at the disused mansion, where he makes a rough encounter with Hank McCoy. Wolverine finally sees Charles and convinces him to break Erik out of prison for killing President John F. Kennedy. The three first head to Peter Maximoff’s house and asks him to help. Meanwhile, Trask asks for funding for his Sentinel program but is denied. In Saigon, Mystique rescues Havok, Ink, Toad and Spyke while finding Trask.
At the Pentagon, Charles, Wolverine, Quicksilver, Hank sneak into the facility and free Erik. Onboard a plane, however, Charles and Erik argue over how they each abandoned each other.