This Collider article ranks the seven most-watched episodes in NBC's history, spanning the network's decades-long run of landmark sitcoms and dramas. It highlights how shows such as The Office, Frasier and ER produced standout instalments that drew exceptionally large audiences, cementing NBC's role in what the piece calls the Second Golden Age of American television, particularly during the "Must-See TV" era of the late 1980s and 1990s.

Among the entries, The Office's Season 5 finale "Stress Relief", airing after Super Bowl XLIII, pulled in 22.5 million viewers and remains the sitcom's highest-rated episode. Frasier's series finale "Goodnight, Seattle" drew more than 25 million viewers across its two parts, making it one of television's most-watched sitcom send-offs. ER's Season 2 episode "Hell and High Water", featuring George Clooney's Dr Doug Ross, is also cited as a defining moment for the long-running medical drama, though the full ranking and remaining entries are not detailed in the excerpt provided.

– The Office's "Stress Relief" (2009) drew 22.5 million viewers, its highest-rated episode.
– Frasier's finale "Goodnight, Seattle" attracted over 25 million viewers.
– ER's "Hell and High Water" is named a career-defining episode for the show.