A harrowing documentary about Britain’s race to be a nuclear power. Plus: spiky New Zealand drama After the Party. Here’s what to watch this evening

9pm, BBC Two
An infuriating investigation into what is described in this documentary as “the longest-running scandal in British history”: the UK government’s nuclear testing in Australia and the South Pacific during the 1950s and 60s, and its severe impact on the health of service personnel and local people. “We were lab rats,” says one of the five veterans interviewed. Most harrowing is a graveyard at Woomera military base, which experienced an unexplained high number of stillbirths and infant deaths during the 50s. Hollie Richardson