Ice is in the air - and on the ground - as many parts of the country contend with winter weather, but in this week's show our heroes contend with a different kind of ice...and it's because that ice has gone missing. Detectives hunt down stolen diamonds in these four radio mysteries, beginning with Richard Kollmar as Boston Blackie in a syndicated episode where diamonds are stolen right from under his own nose. Next, Richard Diamond, Private Detective is blamed when several thousand dollars of stones are pilfered from the police commissioner (originally aired on NBC on November 12, 1949). Then, Sgt. Joe Friday is on the case when a diamond salesman is robbed of his merchandise in "The Big Impression" from Dragnet (originally aired on NBC on August 7, 1952). And finally, John Lund stars as Johnny Dollar as he searches for a stolen yellow diamond in "The Uncut Canary Matter" (AFRS rebroadcast from February 16, 1954).