Dates verified with Mr. Keen, Tracer of Lost Persons: A Complete History and Episode Log of Radio's Most Durable Detective by Jim Cox
40-05-08 The Case of the Missing Doll part 4 is actually 49-05-09
40-05-29 The Woman who Wasn't There is actually 40-06-05 The Case of the Woman who Wasn't Needed Part 3
41-05-13 Young Husband Who Thought His Wife Failed Him s/b 41-04-23
44-03-13 Silver Candlestick Murder is actually 52-03-13 The Silver Candlestick Murder Case
44-04-06 Strange Display is actually 44-03-16 The Case of the Strange Display
44-05-22 (and 44-05-29) The Woman Who Wasn't Needed were actually 40-06-05 The Case of the Woman Who Wasn't Needed Part 3
44-11-06 The Case of the Frightened Child is actually 44-11-16 The Case of the Frightened Child.
48-10-28 Identical Twins Murder part 2 of 3 is actually a fragment of a 30 minute episode. In 1948, Mr Keen was not broadcast in parts, but single 30 minute episodes.
50-05-18 (and 50-05-25) Skull and Crossbones Murder Case is actually 50-06-15 Skull and Crossbones Murder Case
50-06-01 The Broken Window Murder Case is actually 50-05-25 The Broken Window Murder Case
50-06-08 The Quicksand Murder Case is actually 50-06-01 The Quicksand Murder Case
50-06-08 Murder and the Jewel Thief is actually 50-02-09 The Case of Murder and the Jewel Thief
500608 Amusement Park Murder Case is actually 50-02-09 The Case of Murder and the Jewel Thief
52-02-22 Murder and the Revengeful Ghost is actually 55-02-22 The Case of Murder and the Revengeful Ghost