In short: No, the service is an added benefit to subscribers of participating television providers in the United States. You cannot watch NBC live without a cable subscription. Contact your local TV, cable, or digital TV provider online to get access to full episodes.
Note: However, in order to watch recent episodes of our most current series, you don’t always need a TV provider account or credits. If you are looking for free shows, the latest episodes of our newest shows are always available without a login or credits on the NBC app and some of the NBCU family of apps and sites, starting the day after they air.