Boston Blackie starring Dick Kollmar, originally broadcast October 1, 1946, The Undersea Murder. Two deep-sea treasure hunters find their treasure and a double double-cross. Yet a third double-cross confuses the plot. Also Part 1 of a 5 part Yours Truly Johnny Dollar story, The Picture Postcard Matter, originally broadcast October 1, 1956. $100,000 in diamonds is missing, and the clue from Sebastian leads to his death.