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Police believe they have a serial rapist and murderer, but DNA testing and research leads to another arrest and conviction.

Great chefs and food visionaries put their talents on display for the home cook to emulate.

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.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

Little Big Town performs.

Labor Day sales; Little Big Town performs; TV host Mario Armstrong; Today Food with Rick Martinez.

TV personality Martha Stewart; design expert Bobby Berk; style expert Jasmine Snow; TV host Kathie Lee Gifford; actress Michelle Buteau.

Local, national and international news.

Stay informed with the latest breaking news and headlines.

Ohio investigators search for answers in the decades-old murder of 10-year-old Amy Mihaljevic; a retracing of Amy's steps from the day of the kidnapping.

Ohio investigators search for answers in the decades-old murder of 10-year-old Amy Mihaljevic; a retracing of Amy's steps from the day of the kidnapping.

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

Local, national and international news.

Local, national and international news.

Local, national and international news.

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.

News and features about performers, productions and the milieu.

A syndicated news magazine includes investigative reports, interviews with newsmakers, human interest stories and celebrity and pop-culture features.

Eleven acts take the stage in the third week of live quarterfinals; the Live Show Golden Buzzer sends one act directly to the finals and America begins the vote for their three favorite acts to advance.

Jimmy Fallon and celebrity guest Savannah Guthrie pair up with contestants for a word showdown, featuring a round of ear-splitting clues; hosted by Keke Palmer, players guess secret passwords using one-word clues for a chance to win up to $25,000.

Jimmy Fallon and celebrity guest Savannah Guthrie pair up with contestants for a word showdown featuring a round of clues that "rock"; hosted by Keke Palmer, players guess secret passwords using one-word clues for a chance to win up to $25,000.

News coverage to start the day.

Actress Zoe Saldaña; actor Drew Starkey; Feid performs.

Actor Bowen Yang; comic Matt Rogers; musician Finneas.

News coverage to start the day.

Unleash the power of My Best Heart's patented Red Spinach-Potassium Nitrate combination, plus 8 natural dietary blood pressure regulators to maintain a normal healthy range. Improve circulation and restore more youthful energy and vitality.

Following an injury in the aftermath of an industrial fire, Severide and Seager work together to investigate an anonymous tip; Kidd searches for the right person to fill the open spot on Truck 81; a possible new recruit to 51 gets tested at a call.

In 1976, 182 war veterans in Philadelphia become hospitalized with pneumonia-like symptoms and 29 die; the disease resurfaces every few years.

Great chefs and food visionaries put their talents on display for the home cook to emulate.

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.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

Biggest moments in sports history; actors Tom Hiddleston and Hayley Atwell ("Much to Do About Nothing"); producer Neha Joy; Sara Bareilles performs.

Social media medicine trends with Dr. Akshay Syal; lifestyle expert Shannon Doherty; strategic adviser Priya Parker; Today Food with Maria Koutsogiannis.

Writer Arianna Davis Santana; actress Halle Berry; podcast hosts Brené Brown and Adam Grant ("The Curiosity Shop"); fashion designer Emma Grede; actress Julie Bowen.

Local, national and international news.

Stay informed with the latest breaking news and headlines.

Drew Barrymore presents human-interest stories, celebrity guests, lifestyle segments and field pieces, all driven by her infectious brand of humor and optimism.

Drew Barrymore presents human-interest stories, celebrity guests, lifestyle segments and field pieces, all driven by her infectious brand of humor and optimism.

A woman continues searching for answers after the investigation into her daughter's murder goes cold.

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

Local, national and international news.

Local, national and international news.

Local, national and international news.

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.

News and features about performers, productions and the milieu.

A syndicated news magazine includes investigative reports, interviews with newsmakers, human interest stories and celebrity and pop-culture features.

One act advances straight to the finals with last night's Golden Buzzer; America's votes reveal which three acts from the third night of quarterfinals will move on and compete in the semifinals.

Severide is forced to crack open a cold case buried for decades; a routine call hits too close to home for Novak.

Imani struggles to maintain her composure when a new lead reignites her investigation into her sister's disappearance.

News coverage to start the day.

Actor Callum Turner; Chance the Rapper talks and performs; actress Sunny Sandler.

Former professional basketball player Carmelo Anthony; actress Ana Gasteyer.

News coverage to start the day.

Learn what's behind mental decline with age, and how to improve memory, focus and concentration with NeuroQ's Darrin Peterson and Dale Bredesen MD.

Cruz forms a bond with a young immigrant boy he meets while fighting an apartment fire; Squad makes plans to prank the newest member of their team; Hawkins and Violet struggle to keep their relationship a secret.

After a wealthy Southern physician gets murdered with a baseball bat, his wife and a handyman become convicted of the crime.

Asparagus appetizers.

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.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

Stay informed with the latest breaking news and headlines.

Inside the Game: Fantasy football punishments gone viral; legacy of the Southwest pilots program and a new generation of pilots; Carly Pearce performs.

Today's Checklist with Dr. Saema Tahir; catching up with Adria Arjona; What to Read with Victoria Aveyard; Healthy Aging Month with Stephanie Mansour, Karena Wu and Natalie Rizzo; Today Food: Pan grilled fish and summer sides with Nadav Greenberg.

Best of Fun & Games; "Queen of Quips" with Michelle Buteau; catching up with Marcello Hernández and his mom, Isabel; Jenna and Sheinelle try "Purlates"; "Beat the Box" with Casey Wilson, Andrew Rannells and Prue Leith; ping pong game with Dylan Efron and "Boston" Rob Mariano; "Don't Look Back" with Tessa Thompson.

Local, national and international news.

Stay informed with the latest breaking news and headlines.

Drew Barrymore presents human-interest stories, celebrity guests, lifestyle segments and field pieces, all driven by her infectious brand of humor and optimism.

Drew Barrymore presents human-interest stories, celebrity guests, lifestyle segments and field pieces, all driven by her infectious brand of humor and optimism.

A teenage mom and her friends get caught up in a bizarre murder case.

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

Local, national and international news.

Local, national and international news.

Local, national and international news.

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.

News and features about performers, productions and the milieu.

A syndicated news magazine includes investigative reports, interviews with newsmakers, human interest stories and celebrity and pop-culture features.

After a hero fire chief is found dead, Riley and Walker must break through his squad's closed ranks to uncover the truth; when the defense presents a plausible alternate timeline of events, Price and Maroun must fight to win the jury over.

A procedural mistake made during the rescue of a kidnapped boy causes the case to collapse in court; as Griffin gets closer to the truth about Tynan, he finds himself in grave danger.

The murder of a military hero draws the FBI into Brady's investigation; as political pressure rises during Baxter's reelection campaign, Price and Maroun worry that a series of unusual courtroom rulings mean the judge is in the defendant's pocket.

News coverage to start the day.

Actor Jim Gaffigan; model Karlie Kloss; Bebe Rexha performs.

Professional basketball player Karl-Anthony Towns; actress Olivia Wilde; actor Stephen Root; chef Ham El-Waylly.