|First Aired:||19 November 2011|
|Written by:||Jake Michie|
|Directed by:||Justin Molotnikov|
|Guest Stars:||Rupert Young (Recurring), Eoin Macken (Recurring), Adetomiwa Edun (Recurring), Tom Hopper (Recurring), Nathaniel Parker (Recurring), Wayne Foskett, Melanie Hill and Charlene McKenna|
|Filming locations:||Fforrest Fawr|
A mysterious illness draws Merlin to a distant village. But it soon becomes clear that there is more at stake than just his patients’ well-being as something sinister turns the air sour. Far from home and with no-one to trust, Merlin becomes embroiled in a deadly game of cat and mouse. No longer sure who is the hunter and who is the hunted, can the young warlock survive long enough to uncover the truth?