S1 E23 | Mummies Alive!

Aapep is somewhere in London and the museum's mummies seem to have acquired a life of their own. After Theo and Henry prevent a mummy wandering out of the museum in the middle of the night, the gang makes a plan to discover where it was heading, in the hope of discovering Aapep's location. The next night, the gang gathers on the pretext of a sleepover. Aided by Lady Throckmorton, they wait for the mummy to stir again, so they can follow it.