Episodes (x5) vs. Film (x1).
"Den Som Dræber (Those Who Kill)"
OK, for those confused by the recent March 2012 showing on ITV3, here is a breakdown of the episodes.
These ones form part of series 1, which was shown on Danish TV in 10x 45min (split 2-part) episodes and in the UK as the 5x 90min (joint) episodes below:
ep1 of 5 - "Liget I Skoven (The Corpse In The Wood)".
ep2 of 5 - "Utopia".
ep3 of 5 - "Ondt Blod (Bad Blood)".
ep4 of 5 - "Øje For Øje (An Eye For An Eye)".
ep5 of 5 - "Dødens Kabale (Deadly Game)".
http://www.imdb.com/title/tt1565810/episodes
This one is from a separate 90min film, shown in Danish cinema, and shown as the 6th and final "episode" in the ITV3 run:
"Fortidens Skygge (Shadow Of The Past)".
http://www.imdb.com/title/tt1804508
Hope this helps. Enjoy!
...oh, various DVD/BD releases have been released:
http://www.amazon.co.uk/s/ref=nb_sb_noss_1?url=search-alias%3Ddvd& field-keywords=Den+Som+Dr%E6ber