Imagine Dragons film "Passengers". The track was released on November 28, 2016. On September 27, 2016, Imagine Dragons began teasing their third studio album with a tweet simply saying "studio". The band continued posting cryptic messages on their Twitter account for the next four months. On January 28, 2017, the band started posting a series of videos teasing the album's first single. The time-lapse videos featured lead singer Dan Reynolds drawing surreal images on a drawing pad. Morse code was hidden in the videos and translated to "objects of same color". On February 1, 2017, Imagine Dragons released "Believer" as the lead
Gold (Imagine Dragons song) remix of the song was featured on the soundtrack of the video game, "NBA 2K17". According to the sheet music published at musicnotes.com, the song is written in the key of A minor, with a moderate tempo. Along with "Hopeless Opus" and "I'm So Sorry" on "Smoke + Mirrors", the song touches upon lead-singer Dan Reynolds' depression struggles. Dan Reynolds told "Billboard" that "Gold" was one of the last songs to be recorded for "Smoke + Mirrors": "I came home from tour with my head spinning and decided to run away for a bit to the west coast and reflect/write