After sacrificing himself on the Isle of the Blessed to save Arthur and Camelot, the noble Sir Lancelot (played by Santiago Cabrera) returns in this week's episode of Merlin not to help the kingdom but to destroy it. In "Lancelot du Lac," news that King Arthur has asked for Guinevere's hand in marriage spurs Morgana to resort to necromancy to summon the body of Lancelot to do her bidding

In this SPINOFF-exclusive scene, Lancelot makes his first appearance back in Camelot when he reveals himself during a tournament. Merlin airs Friday at 10 p.m. ET/PT on Syfy.