Board Thread:Rewatching "Merlin" - Season One/@comment-5102537-20130512091538/@comment-4909386-20130516201559

Merlin did not know of Uther's mistake up until "The Sins of the Father".

- He was only following an advise from a manupilating dragon.

- Receiving help from Nimueh, who he still remembers from the Cara incident.

To me he was not making a mistake because he has magic, and believes in it to solve his problems. There is a conflict between Excalibur, Le Morte d'Arthur and The Sins of the Father.