User blog comment:Morgause5/Mordred/@comment-3012002-20120715233201

I think he'll be a main cast member for a couple of reasons:

1) According to sources, Mordred will be focused on very heavily this season so I don't think that it was him who captured Morgana or maybe he played a role in capturing Morgana. I'm not sure as I haven't seen the trailer as it hasn't been put up yet.

2) Remember from the information that has been posted up on the Comic Con page? (or if you were at the Panel) Morgana is out for revenge which means that she is likely to ally with someone. Whether that means Mordred we don't know yet, I think it might.

3) If Mordred were to tell Morgana who Emrys was straight out then she would probably kill him too for having kept her would be assassin's name from her for so long. I think the reason why the writers have decided to have Mordred keep the whole 'Merlin is Emrys' thing to himself is because they want Morgana to work it for herself even if she has to torture several people to get her information.