Summer means vacations, but getting out of town doesn’t mean that our detectives can get away from murder and mayhem in these old time radio mysteries. Simon Templar finds multiple murders on a cruise ship in “Murder on the High Seas” from The Saint (originally aired on Mutual on September 18, 1949), and Richard Diamond and Lt. Levinson have a working vacation as they search for a missing man in Bolivia in Richard Diamond, Private Detective (originally aired on CBS on May 31, 1953). Mr. and Mrs. North plan a little getaway, but they have to stop a killer from making their own getaway in “No Vacation for Murder” (AFRS rebroadcast from September 1, 1953). And on a vacation in Maine, Barrie Craig, Confidential Investigator finds a corpse in a haystack in “Hay is for Homicide” (originally aired on NBC on August 31, 1954).