All 51 episodes from the first four seasons of the US zombie adventure drama based on the comic books by Robert Kirkman. In the first season, 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. The episodes are: 'Days Gone Bye', 'Guts', 'Tell It to the Frogs', 'Vatos', 'Wildfire' and 'TS-19'. In the second season, Carl (Chandler Riggs) fights for his life after being shot, and the group continue their search for Sophia (Madison Lintz). The episodes are: 'What Lies Ahead', 'Bloodletting', 'Save the Last One', 'Cherokee Rose', 'Chupacabra', 'Secrets', 'Pretty Much Dead Already', 'Nebraska', 'Triggerfinger', '18 Miles Out', 'Judge, Jury, Executioner', 'Better Angels' and 'Beside the Dying Fire'. In the third season, Andrea (Laurie Holden) and newcomer Michonne (Danai Gurira) are taken to a nearby settlement run by the seemingly benevolent Governor (David Morrissey) and Rick and the rest of the group move into a prison where they believe they should have enough supplies to last them a while but soon realise they have enemies amongst the living as well as the dead. The episodes are: 'Seed', 'Sick', 'Walk With Me', 'Killer Within', 'Say the Word', 'Hounded', 'When the Dead Come Knocking', 'Made to Suffer', 'The Suicide King', 'Home', 'I Ain't a Judas', 'Clear', 'Arrow On the Doorpost', 'Prey', 'This Sorrowful Life' and 'Welcome to the Tombs'. In the fourth 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'.