Merlin - Season 1 Episode 2 -

King Uther Pendragon holds an annual tournament where Prince Arthur Pendragon is to defend his title against other knights of the realm. Sir Valiant comes with a magic secret weapon - a shield from which the painted poisonous serpents can come to life and attack (which Sir Valiant also used to murder its creator). By nursing snake-poisoned knight Ewan, Merlin finds out how this vile knight has been defeating adversaries as easily as Arthur. He informs the prince, but a servant's word is worthless against a knight's, and by the time the prince challenges Valiant, the ...