More delicious darkness pervades Camelot in the increasingly morbid - and impressive - series. Here are several tantalising morsels of information about the contents of the episode, plus a total red herring to throw you off the scent.
The Dragon's breath is of vital importance.
Nimueh played a key part in Arthur's conception.
Arthur must fight a wraith to the death.
Merlin tries to set someone on fire.
Morgana has a vision of Gaius seducing her.
What to Read Next
A Black Knight on horseback rides smashes through Uther's window.
Arthur is crowned.
