Merlin-Season 1-Episode 12-To Kill The King

When Gwen’s father Tom unwittingly helps a renegade sorcerer turn lead into gold, he is arrested and faces trial for treason. Despite pleas from both Arthur and Morgana, Uther is adamant- Tom will be tried and, if found guilty, will be executed. Morgana tries to help Tom escape but tragedy ensues… and Morgana becomes hellbent on revenge. Merlin uncovers a plot to kill Uther, but will he try and stop it- or sit by and let it happen?