Gosh, I love that episode. Just seeing Roy Eldridge (of whom I had many 78’s of, including some of his earlier Vocalions from around 1937), Coleman Hawkins (whose solos with the Fletcher Henderson band were always so exciting and distinctive... not to mention his solo on “Hello Lola” with the Mound City Blue Blowers in 1929), and of course, Ethel Waters, who I also had a good number of 1920s-era 78’s of, including “Shake That Thing.”
I’ve probably watched that episode a dozen times. But I never saw the series until a local channel reran it late on weekday nights in the early-1980s.
You probably seen this , but just in case ...both Hawk and Roy perform . https://www.youtube.com/watch?v=SThGnrorGW8