The Silverlock Sisters: Alien Hostage

Christmas is coming to Galarsfield, but the Silverlock sisters will have their hands full as there's more than just Christmas trees and presents to deal with. Earth is receiving a visit from...aliens?! A dangerous convict named Zanzarr has crash-landed on Earth and as long as he's here, the human race is in danger. Can Ruby, Emerald and Sapphire help officer Merrin arrest Zanzarr before it's too late...?