The episode follows the arrival of , a mysterious former pupil of Gaius, who claims to have found the key to the Tomb of Ashkanar .
: Following the heavy events of the previous episode (Arthur's coronation and Uther's death), this episode features several comedic moments, most notably Merlin magically causing Arthur's trousers to fall down to steal a key. Cast and Production Merlin series 4 episode 4 review: Aithusa | Den of Geek Watch www xrysoi se Merlin 2008 S04E04
: In the final scene, Merlin takes the egg to the Great Dragon, Kilgharrah. By giving the dragon a name— Aithusa , meaning "Light of the Sun"—Merlin calls it into the world. The episode follows the arrival of , a