All 16 episodes from the fourth season of the US zombie adventure drama based on the comic books by Robert Kirkman. When police officer Rick Grimes (Andrew Lincoln) wakes from a coma to find the world in the grip of a zombie epidemic, he joins a small encampment on the outskirts of Atlanta, where a band of human survivors struggle to withstand the terrifying advances of the walking dead. In this season, the entire population of the prison is put in grave danger when a mystereious virus hits and the Governor (David Morrissey) plots his next move after losing Woodbury. The episodes are: '30 Days Without an Accident', 'Infected', 'Isolation', 'Indifference', 'Internment', 'Live Bait', 'Dead Weight', 'Too Far Gone', 'After', 'Inmates', 'Claimed', 'Still', 'Alone', 'The Grove', 'Us' and 'A'.