The song was a massive commercial hit and remains a staple of Smith's discography.

: It features Dianna Agron ( Glee ) as the scorned wife and Chris Messina ( The Mindy Project ) as the unfaithful husband.

: "You say I'm crazy / 'Cause you don't think I know what you've done" —this captures the "gaslighting" often present in failing relationships. 🎬 Cinematic Storytelling

: Smith adopted the viewpoint of the "victim"—specifically the wife—who knows her husband is cheating but chooses to stay for complex emotional reasons.

I'm Not The Only One, by Sam Smith | by Maria Eliadis | Medium

Unlike typical "breakup anthems" that focus on rage or empowerment, this song explores the .

The music video, directed by Luke Monaghan, brings the lyrics to life with a 1950s-inspired aesthetic.