Mystery Jets are an English indie rock band, formerly based on Eel Pie Island in Twickenham, London. The band was formed by Henry Harrison (lyrics, piano), Blaine Harrison (vocals, guitar and keyboards) and William Rees (guitar, vocals) when the boys were still at school and would send each other songs on cassettes. The other member is Kapil Trivedi (drums).
The band's first line-up consisted of Blaine Harrison on drums, William Rees on guitar and Henry Harrison (Blaine's father) on bass. Henry became a second guitarist in the band and they were joined by Kai Fish on bass and Tamara Pearce-Higgins on the organ. Kai joined the band after suggestions that they needed a bassist (he played the cello originally). Their original name was The Misery Jets, which was taken from an Evening Standard headline (Eel Pie Island is under the Heathrow flight path, where planes can be frequently spotted).