Cast: Tenth Doctor David Tennant Agatha Holmes : Mischa Barton episodes First episode: The Home Second episode: The Golem Third episode: Recall the glory Fourth episode: Reverse World Fifth episode: Siege Six episodes: The Fifth Element Seven episodes: The Alchemist vortex Eighth episode: Inner World Ninth episode: Floating Palace Tenth episode: The Beauty and the Beast Eleventh episode: Mastership Plan Twelve episodes: The End of the World after the meet The enemies are returning to Slitheen, the cyborgs, the organ,but there will be new enemies as well.