Pirates of the Caribbean: On Stranger Tides appearance of "Old Bill", the pirate who tries to share his rum with a cat, was also filmed but cut. Pintel and Ragetti were originally supposed to make an appearance, but director Rob Marshall opted out of the idea as he feared their roles would be cut. Cook resigned in September 2009 after working for Disney for over 38 years. Depp's faith in "Pirates of the Caribbean: On Stranger Tides" was somewhat shaken after the resignation, with Depp explaining that "There's a fissure, a crack in my enthusiasm at the moment. It was all born in that office". Depp also
Pirates of the Caribbean: On Stranger Tides (soundtrack) ago", and that he decided to add a "Spanish element" to "On Stranger Tides". Many musicians worked with Zimmer in the score. The biggest collaborators were Mexican duo Rodrigo y Gabriela, whose music Zimmer met after being given their album by a friend. Zimmer said they were picked for the soundtrack because the duo "play rock n' roll with flamenco guitars". American composer Eric Whitacre helped with choir-based songs, most notably the mermaid theme, and brought along his soprano wife, Hila Plitmann. Penélope Cruz's brother Eduardo Cruz wrote a tango song, and Geoff Zanelli contributed to many tracks. Trumpetist Arturo