The sneak peek for Saturday’s Merlin episode “A Lesson in Vengeance” has been released, showing Gwen, Arthur and Merlin in the forest.

The sneak peek shows Arthur and Gwen out for a ride to celebrate their wedding anniversary (and of course, Merlin comes along too. Did we ever expect anything else?), but it looks like someone has set a trap to spook the horses.

Arthur falls off his horse, and bandits rush out to attack him – luckily Merlin is on hand with some secret magical assistance.

Did Gwen and Morgana orchestrate this whole thing? It sure seems likely! Poor Arthur, whether or not Gwen is actually brought back to the good side and saved from Morgana’s manipulation, this is still going to leave him feeling very betrayed by one of the few people he thinks he can trust. Now all we need is for Merlin to reveal that he has magic, and Arthur really might just lose it!

Merlin 5×07 “A Lesson in Vengeance” airs Saturday at 20:00 GMT on BBC One. Will Merlin find a way to save Gwen, or is she doomed to play the role she was born for, the one of Arthur’s betrayer who will help lead him to his ultimate downfall?

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