by Karel and Josef Capek, translated from the Czech by Paul Selver and adapted for the English stage by Nigel Playfair and Clifford Bax
Adapted for radio by Ian Cotterell
with music by David Cain

"So, Naturalists observe, a flea
Has smaller fleas that on him prey;
And these have smaller still to bite 'em,
And so proceed ad infinitum."