Father and son Brian and Alex team up to navigate through new and old duet collaborations from John Butcher/Fred Frith, Colin Stetson/Sarah Neufeld, David Bowie/Brian Eno, Robert Fripp/Brian Eno to Krzystof Penderecki/Jonny Greenwood. Plus music for choirs from Swingle Singers, Andrew Byrne, Caroline Shaw, Roomful of Teeth, 2001: A Space Odyssey (Gyorgy Ligeti). And the zombie apocalypse.