“Dateline NBC” returns tonight, Friday, September 26, at 9 p.m. Eastern, marking a historic milestone: its 3,000th episode. The show is available to watch on multiple streaming platforms today.

It’s been a long time since Dateline fans have had a new mystery to unravel, but the hit crime newsmagazine is back soon with an all-new look at the case of a Colorado dentist convicted of murdering ...