We’ve got a sneak peek at tonight’s all new episode of Merlin, “A Lesson in Vengeance” in which King Arthur becomes the target of a dangerous assassin—his wife & the Queen, Gwynevere. We’ve also got a recap and some clips from last week’s episode.

Plus, make sure you follow NoReruns on Twitter and Facebook because tomorrow we’ll be kicking of a cool contest that will give our readers a chance at winning some autographed Merlin swag!

Merlin—Airs Fridays at 10/9c.

A Lesson In Vengeance – Sneak Peek
King Arthur is the target of a dangerous assassin – his wife and Queen, Gwynevere.

Colin Morgan Talks Ep. 506 – Recap
Merlin star Colin Morgan talks about the important events from episode 506, ‘The Dark Tower.’

Meeting Morgana – Clip from Ep. 506
The greatest betrayal may lie ahead for Arthur, in the form of his true love.

Audience with the Queen – Clip from Ep. 506
Queen Mab visits Emrys and offers him a glimpse of what lies ahead.