Midsomer Murders S20E02 - Death of the Small Coppers

When Mahesh Sidana - butterfly collector and founding member of an elite IQ society - is found murdered, pinned to a wall in a manner akin to his treasured butterfly specimens, DCI Barnaby and DS Winter are thrust into a crime that impacts not only on their community, but internationally. With the help of an old friend, can they catch the culprit before another victim is found?