Saturday (September 11) BBC One at 7.25pm

MERLIN and Prince Arthur are left to protect Camelot from the greatest peril of all in the new series of this fantasy drama.

It has been a year since Lady Morgana (Katie McGrath) disappeared without trace. Just as it seems all hope is lost, Merlin (Colin Morgan) and Prince Arthur (Bradley James) pick up a trial. Set upon by bandits, Merlin’s magic saves the day and they find a bruised Lady Morgana.

Morgana promises Merlin that she has learnt the error of her ways and repents for the evil things she has done.

But as evil magic begins to take hold of King Uther (Anthony Head), Merlin beings to suspect that Morgana’s repentance is not all it seems.