User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/Series 5 Cast/@comment-180964-20120322211905/@comment-180964-20120328195342

Here is another reference link I found about the Alvarr returning for Series 5 news and the Saxons appearing in Series 5 as well. http://www.spoilertv.com/2012/03/merlin-episodes-401-and-402-casting.html