In 1940, France has fallen and Hitler orders Operation Sealion, the invasion of Great Britain. But first the Luftwaffe must defeat the RAF for seaborne landings to succeed. In July 1940 an epic struggle in the skies above England begins. Only a brilliant defensive system and the bravery of young pilots stand in the Luftwaffe’s way. Wave after wave of German bombers are attacked by British planes. Featuring the last interview with the youngest Spitfire-pilot in the battle, Geoffrey Wellum.

The film documents the English heavy metal band Black Sabbath's final show of their farewell concert tour, The End Tour. The performance was held at the Genting Arena in Birmingham, England, hometown of the band's founding members: vocalist Ozzy Osbourne, guitarist Tony Iommi, bassist Geezer Butler, and drummer Bill Ward. Osbourne, Iommi, and Butler performed this final concert with session drummer Tommy Clufetos in place of Ward, as well as Adam Wakeman on keyboards and guitar.
The concert opens with a performance of the song 'Black Sabbath'. The film goes on to show the band performing 'Fairies Wear Boots', 'Under the Sun/Every Day Comes and Goes', 'Into the Void', 'Snowblind', 'War Pigs', 'Hand of Doom', 'Iron Man', and 'Children of the Grave'; at the end of the setlist, the band performs the song 'Paranoid' as an encore.
Interspersed with the final concert are interviews with Osbourne, Iommi, and Butler, in which they talk about their careers and past drug addictions. Additionally, Iommi's 2012 lymphoma diagnosis, which impacted the band's 2012–14 reunion tour and the recording of their 2013 album 13, is discussed. The film also features footage of 'The Angelic Sessions'—the band's final studio recordings, which took place in the days following the final show. Of these recordings, the film shows Osbourne, Iommi, and Butler performing 'The Wizard', 'Wicked World', and 'Changes'.

In the last of the series, Julian Richards uncovers new information from the battle in 1066 between Viking warlord Harald Hardrada and King Harold of England that marked the end of the Viking age in Britain. Results from a nationwide genetic survey show where in Britain the Vikings left a measurable contribution.

Julian Richards recalls how, after years of raiding, England's resistance was so weakened that, in the early 11th century, the Vikings were finally able to seize the throne. In other parts of the British Isles however, they gained and maintained power by integration.

The Caribbean is home to a notorious band of British pirates called the Flying Gang. They plunder merchant ships, sailing from the Americas to Europe and Africa. England's King George I has had enough, so he comes up with a shock tactic to end piracy. It's an offer from the King, a pardon, clemency for those who turn their backs on piracy. Those who refuse will be hunted down and hanged. Two pirates, Blackbeard and Charles Vane stand the King's man, Woodes Rogers. Who will win the final battle?

The Pirate Republic of Nassau gets fat attacking trade between Britain and the Americas. But its foundations are rocked by the death of the most successful pirate who ever lived, Black Sam Bellamy, washed up on a New England beach. But Edward Thatch reinvents himself and becomes the most devilish pirate of all, Blackbeard. Woodes Rogers' campaign begins with the offer of a pardon, which Hornigold and Jennings accept; but not all Nassau pirates agree.