#Listening to Burnin' Coal by Les McCann, the frantic instrumental jazz opener to s02e01 of Severance;
https://www.youtube.com/watch?v=hYQV0v3-Fes
I love the honky tonk piano work on this track. Will definitely listen to some more of McCann's tunes. So far I've found a live album recorded in 1966 in Seattle;