A team of international astronauts are sent on a dangerous mission to reignite the dying Sun with a nuclear fission bomb in 2057.
During World War II, Tommy Shelby returns to a bombed Birmingham and becomes involved in secret wartime missions facing new threats as he reckons with his past.
Follows headteacher Steve battling for his reform college's survival while managing his mental health. Concurrently, troubled student Shy navigates his violent tendencies and fragility, torn between his past and future prospects.