Pure Dead Brilliant

There's trouble brewing at StregaSchloss! When Signora Strega-Borgia invites some would-be witches to stay, weird things begin to happen. Pandora can't resist the temptation of time travel - and Titus picks up a strange and deadly computer virus. Are they falling under the witches' spell? Or is the ghost of the Strega-Borgias' past coming back to haunt them all?