Heroes: Series 3: The Butterfly Effect is no longer available. Programmes are available for a limited number of days after broadcast. Why?
New servant Cedric muscles in on Merlin's position as Arthur's right-hand man. (R)
Merlin helps Arthur disguise his identity to enter a jousting tournament. (R)
Morgana becomes terrified that she has magical powers. Merlin knows she needs th... (R)
Gwen is mistaken for Morgana and kidnapped. Arthur heads out to fight for her fr... (R)
Uther is captivated by the beautiful Lady Catrina, who Merlin suspects to be a t... (R)
As Queen Catrina's true troll nature surfaces, her influence over Uther increase... (R)
Determined to rid Camelot of magic, Uther summons the most feared witchfinder in... (R)
A mysterious warrior challenging Arthur to a duel starts a devastating chain of... (R)
Merlin helps the beautiful druid girl Freya escape from a bounty hunter's cage. (R)
King Alined wants war and is prepared to do anything to make it happen - even ma... (R)
Ruthless warlock Alvarr attempts to reclaim the Crystal of Neahtid with help from M...
On the planet Messaline, the Doctor meets the most important woman of his life. (R)
In 1926, Agatha Christie disappeared for ten days. Was a giant alien wasp to bla... (R)
The Doctor and Donna enter a world of terror inside an abandoned library. (R)
A behind-the-scenes look at The Witch's Quickening.
Gaius fears that a sorcerer has revived the deadly Knights of Medhir.
As the Antares draws closer to Venus, the mysterious secret in Pod 4 is finally exp...
A look at how the sequences with the devious dragon, played by John Hurt, were film...
As the shadows rise, the Doctor forges an alliance with the mysterious River Son... (R)