Season 4
Merlin is bac for a fourth series, with Camelot standing on the brink of a golden age. But its birth will not be an easy one, for the forces of evil are gathering and the darkest hour is just before the dawn...
Episodes
1 The Darkest Hour (1) Oct 1, 2011 
2 The Darkest Hour (2) Oct 8, 2011 
3 The Wicked Day Oct 15, 2011 
4 Aithusa Oct 22, 2011 
5 His Father's Son Oct 29, 2011 
6 A Servant of Two Masters Nov 5, 2011 
7 The Secret Sharer Nov 12, 2011 
8 Lamia Nov 19, 2011 
9 Lancelot du Lac Nov 26, 2011 
10 A Herald of the New Age Dec 3, 2011 
11 The Hunter's Heart Dec 10, 2011 
12 The Sword in the Stone (1) Dec 17, 2011 
13 The Sword in the Stone (2) Dec 24, 2011