A Lesson in Vengeance

S5 E7: Darkness steals into the very heart of Camelot as Morgana and her puppet Queen hatch a sinister plan to murder the King. But when stable hand Tyr Seward (John Bradley) becomes caught in the crossfire, he threatens to ruin everything… As the plot thickens and reaches its deadly climax, can a suspicious Merlin unravel the truth before it's too late?