Which episode of the American TV sitcom Friends was the most-watched episode in the show's history?

"The One After the Superbowl" is a double-length episode of the American television sitcom Friends' second season. It originally aired on the National Broadcasting Company (NBC) in the United States on January 28, 1996, immediately after NBC's telecast of Super Bowl XXX. The network's decision to air the episode directly after the Super Bowl was made in hopes of making it the "highest-grossing ad-revenue day in television history." Guest stars in the episode are Brooke Shields, Chris Isaak, Julia Roberts, Jean-Claude Van Damme, Fred Willard, and Dan Castellaneta. They were cast to draw more viewers and further increase the advertising revenue.

The main plot of the episode sees Ross searching for his former pet monkey, Marcel, and discovering that he is working on a film set in New York. The first part of the episode was written by Mike Sokowitz and Jeffrey Astrof and the second by Michael Borkow. Both parts were directed by Michael Lembeck. The episode drew 52.9 million viewers, making it the most-watched episode in the show's history.