Castle goes undercover as an English language student to investigate a killing while the team struggle to understand a man with a Geordie accent.
Sookie searches for Jason under a full moon; Marnie connects with past spirits; Arlene & Terry cope with a suspicious inferno; Debbie urges Alcide to join a new werewolf community; Eric surrenders to his King's will.
With Marnie empowered by spirits of the dead, Bill issues an unpopular order to save vampires from the light. Eric embraces his amnesia; Jessica has doubts about her future with Hoyt; Alcide and Debbie join a new pack.
As Bill & Marnie brace for a dangerous midnight face-off, Sookie & Eric pledge their allegiance to the King. Sam contends with yet another adversary in Marcus, Luna's ex and the leader of Alcide's new pack.
Jesus tries to purge the restless spirit out of Lafayette; Marcus enlists Alcide to help him deal with the Sam situation; Marnie plots her move against the vampires, during a Festival of Tolerance event at Shreveport.