Season 4 Episode 22 episode 22

'Castle' Season 4 Episode 22 “Undead Again” 5 Sneak Peeks

'Castle' Season 4 Episode 22 “Undead Again” 5 Sneak Peeks

ABC has released five new sneak peeks for Monday's penultimate episode of Castle, “Undead Again”. Zombies, zombies, everywhere!