Merlin

Season 4, Episode 12

Episode Title: The Sword in the Stone (1)

Air Date: 2011-12-17

Overview:

Morgana is now the head of a vast Southron army and a deadly net is closing around Camelot. After the sorceress strikes everyone is forced to run for their lives including Arthur. It is down to Merlin to try and save Arthur from Morgana's clutches.