"The Odyssey" is a 27-minute long song by the alternative rock band Incubus. It appears in parts in the game Halo 2 and in full on the soundtrack, and is divided into four movements. It is a progressive rock piece, and is instrumental except for brief vocals in the First Movement, "Follow". The Third Movement features Trumpet by Red Hot Chili Peppers' Flea A version of the First Movement, "Follow", was released with the Alive at Red Rocks DVD. This version differed in sound from the DVD; there are vocals consistently throughout the song, as opposed to the main version. On the Alive at Red Rocks DVD, Incubus plays a version of the Fourth Movement live that is titled, Everything in Ebb.