The Saboteurs aka The Heavy Water War
https://en.wikipedia.org/wiki/The_Heavy_Water_War
The Heavy Water War (original title Kampen om tungtvannet and alternative title The Saboteurs (UK)) is a six-episode war drama TV miniseries written by Petter S. Rosenlund and produced by Norwegian Broadcasting Corporation.[1] It is a Norwegian/Danish/British co-production directed by Per-Olav Sørensen based on the true story of the German nuclear weapon project during the Second World War and the heavy water sabotage in Norway to disrupt it, with a particular emphasis on the role of the Norwegian intelligence officer Leif Tronstad