KSIX-DT

The Andes, Earth's longest mountain range; baby bears make treacherous descents, rare hummingbirds compete for mates, frogs freeze and revive and lizards battle for territory, all in a land of extremes -- plus new pop-up fun facts.

When a stranger threatens Rollins and Carisi's lives, they suspect it's connected to a case they worked together; Benson asks an old friend to come out of retirement for help with an investigation.

Stay informed with the latest breaking news and headlines.

Actress Millie Bobby Brown; actor Sam Worthington; sombr talks and performs.

Actor Joel McHale; actress Alison Oliver.

Tom Llamas anchors the latest news, going beyond the headlines to see how lives are affected by the world around them.

Stay informed with the latest breaking news and headlines.

The weekday news magazine takes an in-depth look at topics from politics to personal finance, featuring watchdog reports about government corruption and failures, consumer alerts and health care issues.

Reporting of breaking news and developing stories in real time.

This early-morning news covers overnight events, breaking domestic and international news as well as a preview of the day's anticipated events. The program also presents regular reports from the worlds of business, entertainment and sports.

This early-morning news covers overnight events, breaking domestic and international news as well as a preview of the day's anticipated events. The program also presents regular reports from the worlds of business, entertainment and sports.

This early-morning news covers overnight events, breaking domestic and international news as well as a preview of the day's anticipated events. The program also presents regular reports from the worlds of business, entertainment and sports.

Inside the entertainment newsgathering process, as reporters coast-to-coast break headlines, advance the stories of the day and sit down with celebrities.

News coverage to start the day.

Local, national and international news.

Melanie Martinez performs.

Summer skin concerns with Dr. Angela Lamb; Food for Thought: Functional cookies; Amazon Prime Day Viral Sales with Adrianna Brach; Melanie Martinez performs.

Actress Chrissy Metz; Bridget Bahl and Mike Chiodo open up about Bridget's cancer journey; outdoor fun and games with Meredith Sinclair.

NBC News provides viewers with the latest national and international news; consumer, health and personal finance reporting; up-to-the-minute local news.

Stay informed with the latest breaking news and headlines.

Dr. Pablo sits down with Anthony Geisler to dive into the psychology of motivation, the evolution of fitness and the innovations reshaping health engagement; together, the pair will explore scalable systems designed to turn intention into habit.

A homeowner says her contractor vanished after taking advance payment for custom doors; the contractor blames backorders, hospital stays and her constant design changes for the delays; when flaky fixes and flimsy fibs jam the frame, the judges pry open the truth.

A man let his couch-surfing best friend move into his house with him, but, years later, he sues him for nonpayment of rent and accuses him of sexual assault.

Child support and failing vision come into play when lovers call it quits; a disabled young man accuses his former friends of bullying, but they call it staging an intervention.

The weekday news magazine takes an in-depth look at topics from politics to personal finance, featuring watchdog reports about government corruption and failures, consumer alerts and health care issues.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

Local, national and international news.

Local, national and international news.

Tom Llamas anchors the latest news, going beyond the headlines to see how lives are affected by the world around them.

Stay informed with the latest breaking news and headlines.