"Teo" is a Miles Davis composition named for his longtime producer Teo Macero, who was instrumental in shaping many of Davis's most important Columbia recordings. Appearing on the 1961 album Someday My Prince Will Come, this waltz-time piece in F minor is performed at approximately 154 beats per minute and features some of the most adventurous playing on the entire album. Davis opens with eight intense choruses of trumpet improvisation over the 16-bar form, his playing ranging from lyrical statements to more angular, exploratory passages that push against the boundaries of the harmonic framework. John Coltrane then delivers a staggering twelve-chorus tenor saxophone solo that is among the most extended and harmonically daring performances he recorded with Davis. Coltrane's approach here previews the torrential, spiritually charged style that would define his own recordings in the years to come, with cascading runs and multiphonic effects that stretch the tenor saxophone to its expressive limits. Davis returns for four additional choruses to close the performance, his re-entry providing a sense of resolution after Coltrane's explorations. This track captures a pivotal moment in jazz history, documenting two of its greatest figures engaging in a musical dialogue that encompasses both the traditions they shared and the radically different futures they would pursue.