Merlin Season 2 Episode 3

When Morgana sets her room on fire in her sleep she realizes she has magic powers and Merlin, against the advice of Gaius and the dragon, sends her to seek advice from the Druids. Pendragon, believing she has been abducted, orders the deaths of all suspected magicians unless she is returned so Merlin goes after her, locating her in the Druid village, where chieftain Aglain tells her the truth but gives her confidence that magic can be used for good. However, Merlin must get her back to Camelot before Arthur and a vengeful search party catch up with them.