Over 22 million Americans watched the Season 5 premiere of The Walking Dead, making it the most watched cable show of all time. The series, airing on Sunday nights, routinely outperforms Sunday Night Football in the touted 18-49 demographic. The Walking Dead is only the most recent success story in the zombie apocalypse genre. The Resident Evil film franchise has a combined gross of over $900 million worldwide and last year’s World War Z, a