Season 1, Episode 13: Le Mort d'Arthur
Arthur was laid out on the table as Gaius hovered above him, and even though he could tell it hadn't been very long since Arthur had been bitten by the Questing Beast, Arthur looked terrible. His skin was pale, sweating, his brow on fire, and scrunched up in pain. Gaius knew there was only one way to save Arthur now. A way he had sworn never to use again.
"Gaius," Merlin said, and he had that look in his eyes. That determined look in his eyes that Gaius just knew meant trouble. And any other time Gaius might have welcomed it, he might have just encouraged Merlin to try his best in case Arthur could be saved, but this time he knew there was no way Merlin would succeed. "He's my friend." And Gaius really didn't have an answer to that. He feared what Merlin would do with himself when he learned there was nothing more he could do.
He feared just how far Merlin would go to try and save Arthur's life.
"Then save him," Gaius answered, if only to put the inevitable off a little longer.
Merlin turned back toward his magic book, closing his eyes and letting his magic flip through and pick the spell for him. He turned back to Arthur, casting the spell with in out raised hand before casting another in quick succession.
Nothing happened.
"Maybe the spells need time to take effect," Merlin said, his voice low enough as he stood over Arthur that Gaius knew Merlin understood this wasn't true. And Merlin stepped closer to Arthur, staring at him with wide eyes and a strangely broken expression on his face that made him look horribly young again.
And that's the end of Season 1. I'm really not planning on doing anything else with the questing beast episode, because I feel like it's just been done so much, however, if there's any scene from Season 1 you feel I missed or you really want to see, shout at me!