Lou Marini (saxophone), Steve Cropper (guitar), and Donald “Duck” Dunn (bass) tell a story about a time when Cab Calloway sang “Summertime” from Porgy and Bess while walking to their respective elevators. Cab Calloway: Sketches premieres nationally Monday, February 27 at 10 p.m. (ET) on PBS (check local listings). In the New York metro-area the film airs Sunday, February 26 at 8 p.m. on THIRTEEN.