Rare live recordings from Gil Scott-Heron in tribute to a master open up the week for us. Cuban pianist Gonzalo Rubalcaba travels the spirit-ways. And we close with five interpretations of Coltrane’s "Spiritual" featuring the Art Ensemble of Chicago, Steve Kuhn Trio with Joe Lovano, Bobby Hutcherson, Jean-Michel Pilc, and, of course, John Coltrane with Eric Dolphy.