Fangavaktin is the sequel to the Icelandic television series Dagvaktin and the final series in the trilogy. The three main characters from Næturvaktin, Georg Bjarnfreðarson, Ólafur Ragnar and Daníel, have become imprisoned in the infamous Litla-Hraun prison following the murder of the hotel owner in Dagvaktin. The story is continued, and brought to a conclusion, in the feature film Bjarnfreðarson.

The first episode was broadcast on Stöð 2 on Sunday, 27 September 2009, and an episode was broadcast each following Sunday until the final seventh episode aired on 8 November 2009. The series has been released on DVD.