David Muir

The six-member crew of the International Space Station is tasked with studying a sample from Mars that may be the first proof of extra-terrestrial life, which proves more intelligent than ever expected.

An inside look at "Avatar: Fire and Ash," featuring interviews with James Cameron and the cast and creative minds behind the "Avatar" phenomenon.

Prediction markets let anyone bet on anything, from the World Cup to alien invasions. "Instadocs" investigates the explosive rise of global betting.

Why was Alex Murdaugh's conviction overturned? The debut of "Instadocs" digs into stunning allegations of jury interference in his double murder trial.

Celebrating Dolly Parton's life, music and legacy -- featuring never-before-seen interviews with Dolly herself, unforgettable interviews with Robin Roberts and Barbara Walters, and reflections from those who knew her best.

A look back at the top stories, trends and entertainment obsessions that defined the last 12 months.

In 1978, Rodney Alcala won a date on the popular TV show, The Dating Game. What no one knew was that he was a prolific serial killer in the middle of a cross-country murder spree.

A documentary exploring Lev Parnas' involvement in the Trump-Ukraine scandal that resulted in the former president's impeachment, detailing Parnas' unexpected entanglement with Trump and Giuliani, leading to his incarceration.

Exploring the life and achievements of Pope Francis, from his priesthood in Argentina to becoming the Papal head of the church in Rome.

As a nation mourns its longest-reigning monarch, all eyes are on King Charles III, who will carry on his mother's legacy.

The life and legacy of Queen Elizabeth II after Britain's longest-reigning monarch dies at age 96.

The story of Dorothy Stratten (1960-1980), the 1980 Playboy "Playmate of the Year", who was murdered by her estranged husband, just as her entertainment career was taking off.

As 2021 comes to a close, ABC News present its annual two-hour special highlighting the biggest moments of a historic year. With the country still fighting COVID-19, a groundbreaking inauguration, the Capitol insurrection, and continued protests for racial justice, 2021 proved to be a year unlike any other in modern-day history. "Good Morning America" co-anchor Robin Roberts anchors "The Year: 2021" alongside a team of ABC News anchors and correspondents. "The Year: 2021" features reports on the history-defining events of the year, including breakthroughs in space exploration and vaccines, the race to save the planet from global warming, and how America continues to rebuild and reopen following two years of living in a pandemic, as well as the most talked about times in pop culture, such as milestones in movies and television.

Special reporting from the deadly fires in California.

On 8 Dec 1980, the world stood still as it learned about the death of John Lennon, a music icon and former member of The Beatles.

Our Barbara: A Special Edition of 2020, a two-hour primetime special, will feature Walters’ most groundbreaking and iconic interviews, never-before-seen behind-the-scenes footage of Walters, and interviews with Bob Iger, David Muir, Diane Sawyer, Deborah Roberts, Robin Roberts and George Stephanopoulos, among others, according to the network. ABC News will profile Walters’ prolific life and legacy, including making history as the first woman to co-anchor network morning and evening newscasts and paving the way for women in broadcast journalism.

Remembering President Jimmy Carter's life, lessons, and legacy.

New details and new interviews look at the arrest and conviction of Scott Peterson in the murders of his wife, Laci Peterson, and their unborn son.

A group of 20-year-olds whose mothers were pregnant with them when their fathers were killed in the 9/11 attacks and their families talk about their lives.

David Muir interviews survivors and family members who lost loved ones in the attacks on the World Trade Center, the Pentagon and United Flight 93 in Shanksville.