User blog comment:Merlinfan/Old Morgana/@comment-5204542-20120629065132

Morgana would be driven insane if she worked for Gwen but fortunately for Morgana her determination would take through being Gwen's maid. After all not many people would repeatedly try and kill the same man for a few recurring years. I like your idea but wouldn't they have filmed more old  Morgana at Pierrefonds if she was Gwen's servant? Anyway it is probably a more likely to happen suggestion than mine.

My first impute of the picture was that Mithian and Morgana had become allies as they were acting in the same scene. Also Janet Montgomery had tweeted about meeting Katie McGrath before they filmed at Pierrefonds.

I either reckon that:

1)Mithian was so much in love with Arthur that she is envious of Gwen winning his heart. Therefore Mithian is full of vengeance and wishes to inflict pain and kill Gwen. By doing this she shall hope to replace Gwen as Queen. As it would be completely obvious if she killed Gwen, Mithian seeks out Morgana to offer and ask for Morgana's help. They come up plan where they go to Camelot and Mithian introduces old Morgana ask her maid. Then Morgana will kill Gwen but their plan will be ruined as Morgana will cunningly invent a story (eg. A magical creature on the loose) to make them go on an adventure out of Camelot so she can kill Arthur. Mithian will be to afraid to tell Arthur that her "maid" is Morgana.

2) The more likely one being that Morgana will possess Mithian and they will go into Camelot as Morgana disguised as Mithian's maid and Mithian shall tell Arthur a made up story. They shall set off on the adventure and Morgana shall try and kill Arthur and avenge Merlin on behalf of her deceased sister

This is what I would like to happen though the chances are quite low. Sorry if it is a bit complicated and detailed.