the answer to your question is in the video interview (amogst other things)
http://www.digitalspy.co.uk/tv/a138036/tony-head-talks-merlin-series-two-who.html
There will be a Merlin Series 2, sometime in September this year,2009.
Their are 5 series in Merlin
Saturday September 19th.
Merlin - TV series - was created on 2008-09-20.
Merlin will return for a 5th series in the autumn of 2012.
Colin Morgan
Twice.
The duration of Merlin - TV series - is 2820.0 seconds.
YES! On the SciFi channel, starting Friday, April 2.
not till at least series 4
I don't think it will be repeated! You will be able to get it up on BBC iPlayer or youtube!!
yes. It has been said that freya will return in series 3 to help Merlin and arthur get the sword excalibur back and still have that strong emotional relationship with Merlin.