"Welcome to the Tombs" is the sixteenth and final episode of the third season of the post-apocalyptic horror television series The Walking Dead, which aired on AMC on March 31, 2013. In the episode, The Governor (David Morrissey) and Rick Grimes (Andrew Lincoln) prepare for the upcoming assault on the prison. Tyreese (Chad L. Coleman) and Sasha (Sonequa Martin-Green) decide to not participate in the assault and stay on guard duty before preparing to leave, as the citizens of Woodbury become increasingly alarmed at The Governor's erratic behaviour. Meanwhile, Andrea (Laurie Holden) struggles to escape The Governor's torture chamber.