Board Thread:Rewatching "Merlin" - Season One/@comment-5102537-20130406100756/@comment-5674726-20130409204305

Surely it's not right to say that saving Mordred caused Arthur's death, because Mordred saves Arthur's life several times before then, firstly in Arthur's Bane'' by telling Ragnor to take Arthur & Merlin to Morgana when he was about to kill them. He saves Arthur a few more times after that, but if Merlin had let Mordred die then Arthur would have been killed by Ragnor even earlier then his eventual death. So saving Mordred actually prolonged Arthur's life, albeit not by very long... ''

You're forgetting The Nightmare Begins.

Had Mordred not been alive to sense Morgana's distress when she was attacked by serkets, Aglain wouldn't have known to come to her rescue and she'd have died in the forest in early Season Two, before she became a threat to Arthur.