BBC News looks at how the night unfolded.
Tom Brook was the first British reporter to broadcast live from the scene at the Dakota. He looks back on the events of that night and speaks to people about the Lennon legacy. Singer/songwriter James Taylor discloses revelations about meeting Lennon's assassin just days before the attack, and then hearing the gunshots that killed his friend. Irish singer, Bono talks emotionally about the impact Lennon had on his own music. And Lennon's son Sean, who is rarely interviewed about his father, speaks candidly about his legacy.
The negotiations have begun over the UK's departure from the European Union. What is the future now that Theresa May's election gamble failed to deliver the clear mandate she wanted for her Brexit talks with the EU? The BBC's Europe editor Katya Adler and economics editor Kamal Ahmed speak to major players on both sides of the table and those who voted to leave and remain in 2016.
President Trump’s administration has promised that prototypes for a wall to be built all along the US-Mexico border will be delivered by the end of summer. But will a wall stop people smuggling and drug trafficking?
One of President Trump’s campaign pledges was the construction of a wall along the US-Mexico border. But how would a wall stop drugs and people illegally entering the US?
Six years after John McAreavey's wife Michaela was killed on honeymoon in Mauritius, BBC Newsline's Mark Simpson joins him as he returns to the island. No-one has ever been convicted of the murder.
As Barack Obama’s time in office nears its end, people who voted for him reflect on his legacy. From California to Chicago to DC, young black voters look back on his Presidency.
Singer and songwriter Bruce Springsteen speaks to BBC arts editor Will Gompertz about his music, depression and the state of US politics, as he launches his autobiography.
Live build-up and coverage from Washington of the inauguration of Joe Biden as president of the United States. Presented by Katty Kay.
Special coverage of events being held to commemorate the twentieth anniversary of the 9/11 attacks, with Laura Trevelyan in New York.
Tim Rogers investigates the effectiveness of sports supplements, looking at whether they work and whether users can be sure of what they are getting.
DJ Edu is on a journey to find the best nightlife in Africa as part of the BBC's Richer World season - looking at how many across the world are getting richer. He visits Kenya, the Democratic Republic of Congo, South Africa, Morocco and Botswana.
This year the Queen became Britain's longest reigning monarch. Sarah Campbell looks back on the momentous occasion and another royal birth in Review 2015: The Royal Year.
Rebecca Morelle looks back on the year in science – from a British astronaut blasting off into space, to efforts to halt global warming here on Earth.
From the conflict in Ukraine to accusations of hacking and then sanctions, relations between Russia and the West have deteriorated dramatically under Vladimir Putin.
In January 2017 Finland began a bold social experiment: the government started paying 2,000 unemployed Finns basic income.
From the morning commute, to lunch hours, to the way people are hired and fired - the nature of work is set to change radically in the next two decades.
BBC Culture asked writers, thinkers and leaders to nominate the stories that they think have shaped the world. Clemency Burton-Hill hosts a panel of authors to discuss the results.
As countries around the world feel the effects of the summer heatwave, BBC News looks at the impact and causes of the extreme weather.
Witness goes back to the First World War to find out about the life of soldier, poet and writer Robert Graves. Plus how the game of Paintball was invented.
Britain's farmers have faced a year of unusual weather and tough conditions. The BBC's Danny Savage takes a look at 12 months of challenging times in Review 2018: The Rural Year.
From fake news to data breaches, big budget TV shows to the changing face of the press, it's been an eventful 12 months for the media. The BBC's Amol Rajan gives his take in Review 2018: The Media Year.
Britain's high streets are going through a dramatic period of change, with big name closures and the shift to online. The BBC's Emma Simpson reports on 12 months that have changed the shape of shopping.
It was the year climate scientists warned it was now or never to save the planet, NASA sent a probe to touch the sun and a paralysed man took his first steps. The BBC's Pallab Ghosh looks back at 12 months in science and the environment.
As her party prepares to select a new leader, Mark Urban reports on the rise and fall of Germany's most dominant politician of the 21st century, Angela Merkel.
Mark Kermode sorts the crackers from the turkeys, in his Christmas review of 2018's big releases on the silver screen.
The World Cup in Russia delivered a summer of football fever, with England making a memorable journey to the semi-finals. The BBC's Olly Foster was there and reports on the highs and lows of the tournament.
The rocky road to Brexit has made it a turbulent year in British politics. Jo Coburn - from the BBC's Politics Live - takes a look back at a seismic 12 months.
Stephen Hawking, Aretha Franklin, Kofi Annan, John McCain, Stan Lee, Tessa Jowell and Ken Dodd - just a few of those who left us this year, and whose lives are celebrated.
From Harry and Meghan's wedding to Prince Charles's 70th birthday party, the BBC's Daniela Relph looks back at the big events in Review 2018: The Royal Year.
Private Eye's editor Ian Hislop talks to the BBC's Media Editor Amol Rajan about front covers, cartoons and satire: making sense of the world in 2019.
BBC News looks at the long-term effects of the pandemic on education, and what is being done to help children and young people as they return to schools and colleges.