The Code in His Pocket Changed Everything

In December 1948, the body of an unidentified man was discovered on Somerton Beach near Adelaide, Australia. He had no identification, and the only clue was a piece of paper with the words "Tamam Shud" in his pocket. This cryptic message, coupled with a string of undeciphered letters, has left investigators puzzled for over seventy years. Who was the Somerton Man, and what secrets did he take to his grave?