This may well be my favorite episode of Merlin as a whole, and it is definitely my favorite of this series so far. From the beginning when Arthur decides to be his own man and ask Gwen to marry him contrary to Agravaine's wishes, to the final scene where Merlin says goodbye to Lancelot, I loved every bit of it.
To start the episode off, Arthur informs his uncle that he is going to make Gwen his Queen. Agravaine informs Morgana of this and she is enraged. To get her revenge she conjures Lancelot from the dead, although it is not the true Lancelot; his soul doesn't possess his form. During a tournament that Arthur holds as an engagement gift to Gwen, Lancelotreappears, seemingly from the dead and causes problems. Lancelot seems mostly normal to the residents of Camelot, but he has forgotten that Merlin has magic and Merlin becomessuspiciousof him. Meanwhile, Lancelot gives Gwen a bracelet thatunbeknownstto her is enchanted to make her old feelings for Lancelot resurface. Arthur catches Lancelot and Gwen kissing in the council room and puts them both in the jail where Lancelot kills himself at Morgana's request as he must do anything she asks. Arthur summons Gwen before him and questions her. She tells him for the first time that she loves him, but he exiles her away from Camelot anyway because he can't trust her anymore. The next morning Merlin watches Gwen leave Camelot before he goes to the lake of Avalon to give Lancelot a proper funeral similar to what he did for Freya. Merlin is able to rescue Lancelot's true spirit so that it isn't in Morgana's hands any longer, but he isvisibly heartbroken over the death of one friend and the exile of another. Merlin asks Arthur is he'll ever forgive Gwen to which he replies that he forgives her, he can just never trust her again.
The acting in this episode was superb and my favorite moments were the scene where Arthur questions Gwen and the funeral scene at the conclusion. Bradley, Angel, and Colin's acting was amazing in all of these scenes. I also liked that the episode didn't really have a happy ending because this sets up better for the overall arc of the plot of the series as the issues from this story line will have to be resolved later. I also adored the music in this episode, especially the score the in the final funeral scene. It may very well be my favorite theme in the whole show, next to the Arthur/Gwen theme.
Overall, I thought this episode was awesome and definitely the best of the series so far.