Merlin Episode 4.04 ‘Aithusa’ Preview and Photos

The BBC has released a new trailer for the fourth episode of season four of its popular Arthurian fantasy adventure series Merlin.  In this episode, Merlin meets the mysterious stranger Julius Borden (guest star James Callis of Battlestar Galactica), who arrives with news of a remarkable treasure:  he has discovered the last remaining dragon’s egg.

Colin Morgan stars as Merlin, Bradley James as Arthur.  Aithusa airs October 22 at 8:15 PM on BBC1.