Start collecting the awesome new Doctor Who: Monster Invasion and build up a cool trading card collection! Each pack of nine trading cards is bursting with cool alien facts, monster slamdowns, and puzzles! Learn how to play games with your cards and how to use them on the Doctor Who: Monster Invasion website to bring your 3-D cards to life and unlock brilliant game bonuses! This 345-card set is introduced in 9-card regular and extreme boosters packed in 24-count displays.