Psapp composed Grey's Anatomy's main theme, “Cosy in the Rocket.” The London-based experimental pop duo—Galia Durant and Carim Clasmann—created the distinctive track that became closely identified with the series.
“Cosy in the Rocket” originally appeared on Psapp's 2004 album *Tiger, My Friend*. Grey's Anatomy used it as its opening theme during the show's early seasons, helping introduce the program's blend of medical drama, romance and restless young-doctor energy.
The song has an unusual history in the series. The full version was used for the original opening, while an instrumental version served as the end theme. The opening was later shortened or omitted in many episodes, but the track remained part of the show's musical identity and returned in selected seasons.
A common mix-up is confusing Psapp with Danny Lux, who is credited as the series composer. Lux wrote the show's underscore, while Psapp supplied the separate theme song. Other bands in the answer choices contributed music to the series, but none composed “Cosy in the Rocket.”