The Big Bang Theory is now collectible! The characters on The Big Bang Theory do everything that we, as hobbyists, love: discussing science, passionately debating hypothetic battles between comic book characters, and playing games. So, it's only fitting that the cast has their own trading cards, and fans can collect their favorite moments from the show's third and fourth seasons. A 72-card base set and two 9-card chase sets will give you more Big Bang for your bazinga! 5 cards per pack.