All ten episodes from the fourth season of the biographical drama based on the life of Queen Elizabeth II. The story picks up in 1979 as Margaret Thatcher (Gillian Anderson) is elected Britains first female Prime Minister. Under pressure from his family to find a suitable wife, Prince Charles (Josh O Connor) begins dating Lady Diana Spencer (Emma Corrin). The episodes are: Gold Stick, The Balmoral Test, Fairytale, Favourites, Fagan, Terra Nullius, The Hereditary Principle, 48:1, Avalanche and War.