When does The Undeclared War return?

The Undeclared War is a British near-future thriller television miniseries, aired from 30 June 2022 on Channel 4. The series follows two main characters, Saara Parvin in the UK and Vadim Trusov in Russia, during a cyber and misinformation attack upon the UK. Channel 4 announced on 12 February 2025 that a second series consisting of six episodes would be produced.