User blog comment:EmrysOfAlbion/Series 5 Poster - Kilgharrah imprisoned Morgana?/@comment-4190137-20120906085934

Okay now I see it!

http://images.wikia.com/merlin1/images/9/99/Merlin_Series_5_Poster.jpg

At the bottom, you can see the right side of Kilgharrah's head, looking at Morgana, and her hands are handcuffed.

Wow! Well pointed out! Unless of course the dragon is Aithusa, but I doubt it...