Sep 10, 2009 · 1h


The Section de recherches is a special unit of the Gendarmerie nationale, responsible for the most complex cases. In Bordeaux (from 2006 to 2013) and then in Nice (since 2014), child abductions, disappearances, heinous or sexual crimes are the daily lot of the investigators in this research unit. In the search for witnesses, the team is authorised to extend its investigations beyond France's borders.
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Quick answers about this season's release timeline and episode lineup.
Research Unit Season 4 premiered on September 10, 2009.
Research Unit Season 4 has 14 episodes.
The season opens with Season 4 Episode 1, "Episode 1". It aired on September 10, 2009.
Go to Season 4 Episode 1