The royal family mourns the passing of Winston Churchill. The United Kingdom ushers in a new prime minister, the Labour Party's Harold Wilson whom Prince Philip and Queen Elizabeth hear might be a Soviet spy.

While Princess Margaret and Lord Snowdon visit the USA, the queen, at the bidding of Harold Wilson, asks them to make a side trip to Washington, D.C. to ask President Johnson for financial assistance for the United Kingdom.

A horrible disaster in the Welsh town of Aberfan leaves scores of children dead, but when the Queen takes a week to decide to visit the town to offer solace to its people, she must confront her reasons for postponing the trip.

Left without a home by a political coup in Athens, Philip's eccentric mother, Princess Alice of Greece, is invited to live in Buckingham Palace by the Queen.

While the Queen travels abroad to learn about horse training, unhappiness among the British elite with the devaluation of the pound involves Lord Mountbatten in a plan to oust Harold Wilson.

Prince Charles is sent to Aberystwyth to learn Welsh from an ardent nationalist in preparation for the ceremony for his investiture as Prince of Wales.

The 1969 moon landing occasions a mid-life crisis in Prince Philip, who thinks of the adventures he has missed as the Queen's consort.

Charles visits the exiled Duke of Windsor in his Paris chateau, only to find him very ill. But will the Queen make peace with her uncle before he dies?

While Princess Anne dates her elder brother's polo rival Andrew Parker Bowles, Prince Charles falls deeply in love with Camilla Shand causing the Queen Mother and Lord Mountbatten to interfere.

As her marriage falls apart, Princess Margaret finds solace in the arms of a much younger landscape gardener. The Queen and the nation celebrate Elizabeth II's Silver Jubilee.

As Elizabeth welcomes Britain's first woman prime minister and Charles meets a young Diana Spencer, an IRA attack brings tragedy to the royal family.

Margaret Thatcher visits Balmoral but has trouble fitting in with the royal family, while Charles finds himself torn between his heart and family duty.

After Charles proposes, Diana moves into Buckingham Palace and finds her life filled with princess training, loneliness — and Camilla Parker Bowles.

While Margaret Thatcher struggles with the disappearance of her favorite child, Elizabeth reexamines her relationships with her four children.

As Thatcher's policies create rising unemployment, a desperate man breaks into the palace, where he finds Elizabeth's bedroom and awakens her for a talk.

On a tour of Australia, Diana struggles to balance motherhood with her royal duties while both she and Charles cope with their marriage difficulties.

Grappling with mental health issues, Margaret seeks help and discovers an appalling secret about estranged relatives of the royal family.

As many nations condemn apartheid in South Africa, tension mounts between Thatcher and Elizabeth over their clashing opinions on applying sanctions.

Charles is caught in a deadly avalanche, prompting both him and Diana to reevaluate their commitment to their troubled marriage.

Amid a growing challenge to her power, Thatcher fights for her position. Charles grows more determined to separate from Diana as their marriage unravels.

A much-needed update to the Royal Yacht draws scrutiny to the Queen's reign. Hounded by the press, Charles and Diana have a second honeymoon in Italy.

Prince Philip offers his support to a grieving family member. Keen to snatch a scoop, a tabloid journalist approaches Diana about a tell-all book.

In 1946, an Egyptian street vendor finds inspiration in the abdicated King Edward. Years later, he eagerly tries to integrate into British High Society.

Between a fire at Windsor Castle and tensions in her children’s marriages, the Queen commemorates and reassesses her 40 years on the throne.

Faced with the fallout of an intercepted call with Camilla and the consequent kickback to his marriage, Prince Charles must navigate a scandal.

Eager to lead a newly democratic Russia, President Yeltsin tries to win the Queen's support while she navigates new rifts in her marriage with Philip.

As BBC's Martin Bashir goes to great lengths to secure an interview with Diana, the lonely princess finds purpose and warmth in a London hospital.

The Queen spends quality time with Prince William. On Guy Fawkes Night, fireworks make for a perfect distraction from Diana's BBC interview.

The Princess of Wales contends with the repercussions of her statements. The Queen asks the Prime Minister for his help in a delicate family matter.

After heightened public scrutiny, Charles forges a new alliance in Hong Kong. Mohamed Al-Fayed offers his support to a newly-divorced Diana.

Diana holidays in Saint-Tropez with Al-Fayed and bonds with his son Dodi. Charles is crushed when the Queen won't attend Camilla's 50th birthday party.

Cameras flash and a media circus swirls as Diana and Dodi spend more time together. In retaliation, Charles stages a fatherly photo op with his sons.

Dodi's father urges him to propose, but marriage is the last thing on Diana's mind. Later, a high-speed car chase with paparazzi ends in disaster.

As the world mourns, the Queen's silence prompts ire and warnings from a grieving Charles. How will she rise to the occasion and mother her nation?

Hounded by press and adoring girls, 15-year-old William struggles to find stability after Diana's death. Charles enlists his own parents to help his son.

Eager to improve the monarchy's public image, the Queen seeks out savvy statesman Tony Blair — but the Prime Minister's advice defies royal protocol.

Now at university, William sets his eyes on Kate Middleton. With meddling parents and other prospects in the mix, how will their connection bloom?

After a series of strokes, a declining Margaret recalls a wild night with her sister at the Ritz in 1945, and later celebrates her 70th birthday there.

Reeling from loss and wary of her Golden Jubilee, the Queen bonds with William, who finds his footing between normality and life in the royal limelight.

The Queen gives Charles the green light to wed Camilla. Tasked with planning her own funeral ahead of her 80th birthday, she faces an existential crisis.