Which season 1 episode drew 25.5 million viewers?

"Love at First Fight" was the season 1 episode that drew 25.5 million viewers.

It is the 21st episode of the first season and originally aired on February 18, 1991. In the episode, Will becomes interested in a girl whose father is strongly opposed to their relationship, creating a comic clash between Will's approach and the protective father's expectations.

The episode's audience was unusually large compared with many other season 1 installments. For comparison, the season premiere drew 20.1 million viewers, while "Homeboy, Sweet Homeboy" reached 22.7 million and "Courting Disaster" reached 24.3 million. "Banks Shot," which aired immediately after "Love at First Fight," drew 21.2 million.

The number also helps explain why the title can be confused with other highly rated early episodes. The first season steadily built the show's audience as NBC established Will Smith's television persona and the Banks family's mix of affluent sitcom life, youth culture, and family conflict.