Säsongen 3 av The Tunnel startade på Sky Atlantic (UK) på jeudi 14 décembre 2017, Detta är den pågående säsongen, den har bara ett avsnitt för tillfället..
When a prominent French politician is found dead on the border between the UK and France, detectives Karl Roebuck and Elise Wassermann are sent to investigate on behalf of their respective countries. The case takes a surreal turn when a shocking discovery is made at the crime scene, forcing the French and British police into an uneasy partnership. (Adaptation of Swedish-Danish series Bron|Broen)