Part two of two of Arthur’s Bane.

Arthur and Merlin are exhausted as they make their way across the icy plains toward the fortress of Ismere, but with each tired step, the warlock’s fear intensifies. What powerful secrets are Morgana and the druid Ruadan searching for among its twisted catacombs? And what dangerous game is Morded playing? It seems not even Merlin can stop his king from walking into the certain danger as the great battle for Albion begins.

At 13th of October 2012 at 8:25 pm – 9:10 pm on BBC1. Time is GMT + 1.

source: http://www.radiotimes.com/episode/shwv9/merlin–series-5—2-arthurs-bane-part-two