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.

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.

Ten years after the tragic disappearance and mysterious death of three year old Caylee Anthony, her grandparents, George and Cindy Anthony, open up to Elizabeth Vargas about their lives.

A report on the secretive Capital Region business NXIVM (Nexium), including the recent revelations that women connected to the group were branded with a symbol that incorporates the initials of Keith Raniere, NXIVM's founder. NXIVM has been described as very expensive brainwashing, labeled as a pyramid scheme, an alleged sex-trafficking operation, and an alleged sex cult.

"Breaking Their Silence: Inside the Gymnastics Scandal" examines this unimaginable story that rocked the gymnastics world and speaks to victims and experts about what parents and children need to know as they navigate situations outside of the home. Featuring exclusive interviews with Larry Nassar’s victims and experts close to the crisis, the special dives deep into the stories of multiple survivors and examine how organizations meant to keep girls and young women safe ultimately silenced their voices. "Breaking Their Silence: Inside the Gymnastics Scandal" features interviews with gymnasts Racheal Denhollander, Lindsey Lemke, Mattie Larson, Akemi Look, and Jamie Dantzscher as they recount their experiences as well as exclusive footage of 19 of Nassar’s victims sitting down for a compelling interview with Elizabeth Vargas.

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.