DATELINE NBC To Present All-New THE FAVORITE SON On Friday 12/8

'While He Was Sleeping' to Air this Weekend

All-New "The Favorite Son" airs Friday, December 8 at 9 p.m. ET/8 p.m. CT

After a small business owner and his bride are murdered just a few months after their wedding, police start looking into stories about a nasty family feud. Josh Mankiewicz reports.

VIDEO PREVIEW: http://nbcnews.to/2iWqlT4

"While He was Sleeping" airs Saturday, December 9 (see below for air times according to time zones)

When a successful luxury car dealer is murdered in his sleep, detectives shift their focus to one of the victim's lovers. With a lack of hard evidence, the investigation stalls until a year later when one lucky clue breaks the case wide open. Josh Mankiewicz 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 11.

VIDEO PREVIEW: http://nbcnews.to/2jlc9Ac

ABOUT DATELINE

Dateline 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.