Scoop: DATELINE 12/1 & 12/2 on NBC

Scoop: DATELINE 12/1 & 12/2 on NBCDateline is the longest-running series in NBC primetime history. In its 26th season, Dateline is anchored by Lester Holt and features correspondents Andrea Canning, Josh Mankiewicz, Keith Morrison and Dennis Murphy.

Airing Fridays at 9 p.m. ET/8 p.m. CT, Dateline reaches more than 20 million people every week through its broadcast, and millions more through its social media platforms. David Corvo is the senior executive producer, and Liz Cole is the executive producer. Follow Dateline on Facebook, Instagram and Twitter.

All-New "Poisoned" airs Friday, December 1 at 9 p.m. ET/8 p.m. CT

The unexplained death of a beloved chiropractor becomes a criminal investigation when authorities discover she'd been poisoned. Detectives focus on her own family before an anonymous letter leads them to the unlikeliest of suspects. Andrea Canning reports.

"The Knock at the Door" airs Saturday, December 2 (see below for air times according to time zones)

Soon after a young woman is found murdered, her case turns cold. Will her mother's search for answers bring justice? Keith Morrison reports.

Due to NBC's primetime schedule, the broadcast will air at different start times and dates this weekend, according to time zones:

Eastern: airs at 9 p.m. ET on Saturday
Central: airs at 8 p.m. CT on Saturday
Pacific: airs at 10 p.m. PT on Sunday
Mountain: Will be preempted this weekend. Viewers can watch the episode 'On Demand' or online Monday, December 4.

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