We're off to the Caribbean with four old time radio mysteries full of island intrigue. An American professor finds murder on sabbatical in "A Passage to Benares" from Suspense (originally aired on CBS on September 23, 1942). Joan Banks pulls Frank Lovejoy into a dangerous salvage operation in "Chain Reaction" from The Whistler (originally aired on CBS on May 12, 1948).  Humphrey Bogart and Lauren Bacall bring their combined star power to tropical thrills in Bold Venture (a syndicated episode known as "Murder in the Yucatán Peninsula"). And finally, Johnny Dollar boards a yacht to act as a bodyguard in "The Time and Tide Matter" (AFRS rebroadcast from February 16, 1958).