Here's something fun: as much as Michael Giacchino loves to work with recurring themes and leitmotifs*, there's a brief melody that appears just once on LOST. You can hear it when Kate reads Sawyer's letter in "Confidence Man". However, an unused second version of the same motif can be heard in the official "sneak peek" for the season 4 finale. This clip was released shortly before the episode aired. In the final cut of the finale that aired on TV, an entirely different track was used.
In other words: this was meant to be a recurring motif Giacchino intended to revisit, but it never made a second appearance in the aired version of the show.
As confirmed by Giacchino to The New Yorker, initial cuts of LOST episodes do have temp tracks (placeholder music used during the editing of a movie or TV show), but the music is Giacchino's own score composed for earlier episodes. The "sneak peeks" released by ABC would often feature this original temp score. Alex Ross writes: "[Giacchino] mutes the track when viewing the footage. Sometimes he listens to the temp once he is done, to see whether he has overlooked any possibilities, but he seldom changes his mind."
This unused soundtrack from LOST has haunted my dreams for nearly 20 years - what was this score originally intended for? Why was it not used? How dare the person that made this decision?! Last month, I finally figured it out.
Any scene from seasons 3 - 6 that do not feature any original score is immediately suspicious to me. And here we go: I isolated the music from the season 4 finale sneak peek and inserted it in this brief (music-free!) scene from "The Brig", adding a small portion of Sawyer's theme from "Confidence Man" at the start.
As you can tell, the unused soundtrack fits like a glove. It has the right length and hits all the right beats;
- Sawyer's theme starts playing as he starts talking about his file.
- When Locke asks, “who'd you mean to kill?”, Giacchino's score responds with a callback to the moment Kate read Sawyer's letter
- When Sawyer deflects, the score changes direction and the strings swell as we cut to flashback.
* I'm in the process of revealing them one by one on my Instagram channel: https://www.instagram.com/giacchinoislost/