<P> Larry reunites with Cecil, now in retirement, who realises the end of the tablet's magic will cause the exhibits to become lifeless . Cecil explains Ahkmenrah's parents, Merenkahre and Shepseheret, may be able to restore the tablet's power, but are located in the British Museum . Larry convinces the museum's curator, Dr. McPhee, to let him ship Ahkmenrah to London to restore the tablet, convinced that McPhee knows its secrets . Larry and Nick travel to the British Museum, bypassing the night guard Tilly . To Larry's surprise, Theodore Roosevelt, Sacagawea, Attila the Hun, Jedediah, Octavius, Dexter the capuchin monkey, and Laaa have come as well . Laaa is left to stand guard while the others search the museum, the tablet bringing its own exhibits to life . </P> <P> They are joined by a wax Sir Lancelot who helps them fight off the aggressive museum exhibits like a Xiangliu statue and a Triceratops skeleton . Jedediah and Octavius fall through a ventilation shaft, but are rescued from an erupting Pompeii model by Dexter . The group find Ahkmenrah's parents, learning the tablet's power can be regenerated by moonlight, since it is empowered with the magic of Khonsu . Lancelot mistakes the tablet for the Holy Grail and steals it, leaving to find Camelot . Larry and Laaa are locked in the employee break room by Tilly but escape, Laaa remaining behind to distract Tilly, but they become attracted to each other . </P> <P> Lancelot crashes a performance of the Camelot musical, starring Hugh Jackman and Alice Eve as King Arthur and Queen Guinevere, but Larry and the others chase him to the theatre roof, where the New York exhibits begin to die . Lancelot then sees that the quest was about them and gives the tablet back . The moonlight restores the tablet's power, saving the exhibits . They decide that Ahkmenrah and the tablet should stay with his parents, even if it means the New York exhibits will no longer come to life . Back in New York, Larry spends some final moments with his friends before sunrise . </P> <P> Three years later, Larry now works as a teacher, and a travelling British Museum exhibit comes to New York . Tilly becomes the new night guard, and gives the tablet to Dr. McPhee, showing him its power, and allowing the exhibits to awaken again . Outside, Larry watches them party inside . </P>

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