Apple has extended its universal search function on the Apple TV to now include NBC shows in its results, provided the user has installed the NBC tvOS app.
The search results can be generated either through Siri, or through the Search app, and includes support for searches by title, genre, and actor, among other queries.
NBC joins CBS, more recently, among other channels including: Disney Channel; Disney Jr; Disney XD; FOXNOW; FXNOW; HBO GO; HBO NOW; Hulu; Nat Geo TV; Netflix; PBS; PBS Kids; SHOWTIME; SHOWTIME Anytime; Starz, and Watch ABC, all of which are supported by universal search.