The third season of Merlin (2008) kicks off with a high-stakes, two-part premiere titled It is a pivotal episode that officially marks Morgana’s transition from Camelot’s ward to its greatest internal threat. The Story: " The Tears of Uther Pendragon "
Set one year after the events of the Season 2 finale, the story begins with Arthur and Merlin still fruitlessly searching for the missing Lady Morgana.
Morgana puts on a facade of being a victim, even telling Merlin she "understands" why he poisoned her to lower his guard. In reality, she has spent the year training with her half-sister, Morgause.