Merlin Season 01 Episode 05 - Lancelot

Lancelot arrives in Camelot and saves Merlin from a griffin. Merlin realises Lancelot's worth and tries to help him become a knight, despite his lack of noble blood.

Merlin Season 01 Episode 04 - The Poisoned Chalice

Camelot is celebrating the union between the kingdoms of Camelot and Mercia. When Merlin meets Nimueh posing as a young girl, she tells him that Bayard of Mercia plans to poison Arthur. In an attempt to prevent this, Merlin is poisoned instead.

Merlin Season 01 Episode 03 - The Mark Of Nimueh

When the waters of Camelot are mysteriously poisioned, Uther blames Gwen and she is soon arrested. However, they are unaware that this is the magic of an evil, yet beautiful witch named Nimueh.

Merlin Season 01 Episode 02 - Valiant

Knight Valiant arrives in Camelot to compete in the annual sword-fighting tournament and faces Arthur in the final. Merlin realises the combatant has a ruse to beat his opponents that could spell death for the prince — but struggles to convince King Uther of his findings.

Merlin Season 01 Episode 01 - The Dragon's Call

Merlin is sent by his mother to start a new life in Camelot, where he witnesses the execution of a man for using magic and learns he must tread carefully from now on. When he later steps in to protect Prince Arthur and encounters the Great Dragon, the young sorcerer begins an adventure that will determine his destiny.