The Heavy Water War (original title Kampen om tungtvannet and alternative title The Saboteurs (United Kingdom)) is a six-episode war drama television miniseries written by Petter S. Rosenlund and produced by Norwegian Broadcasting Corporation. 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.

The first two episodes were initially broadcast on NRK1, on 4 January 2015. The opening episodes had 1,259,000 viewers, which was a record for the opening of a drama series in Norway.

In Denmark, the initial broadcast was on 4 May 2015 on TV 2 titled Kampen om det tunge vand.

In the UK, the miniseries, retitled The Saboteurs, was aired by More4 from 19 June 2015 and had a good critical reception. The series was released in the UK on DVD and Blu-ray on 10 August 2015. In Poland the show premiered on 15 January 2016 on ipla VOD to very good reviews. Viewing rights for France were bought by Entertainment One, for Benelux by Lumière, for Spain by A Contracorriente, for Poland by Kino Swiat and for the Balkans by Stas Media. Viewing rights for the US were bought by MHz Networks, which announced a DVD release date of 8 March 2016.