- Detective

Mr. Keen, Tracer of Lost Persons
55 episodes Aired 1937-1955
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1. The Case Of The Woman Who Wasn't Needed
   12mins Aired 1940-06-05
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2. The Case Of The Moonless Night
   30mins Aired 1944-01-06
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3. The Case Of The Missing Witness
   30mins Aired 1944-01-13
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4. The Case Of The Girl Who Sang Too Well
   29mins Aired 1944-01-20
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5. The Case Of The Girl Who Flirted
   30mins Aired 1944-02-03
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6. The Case Of The Boy Who Used Big Words
   29mins Aired 1944-02-10
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7. The Case Of Mr Trevor's Secret
   30mins Aired 1944-02-17
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8. The Case Of Murder In The Air
   30mins Aired 1944-02-24
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9. The Case Of The Strange Display
   29mins Aired 1944-03-16
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10. The Case Of The Leaping Dog
    30mins Aired 1944-04-13
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11. The Case Of The Woman In Blue
    30mins Aired 1944-06-15
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12. The Case Of The Frightened Child
    30mins Aired 1944-11-16
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13. The Nightmare Murder Case
    30mins Aired 1944-12-14
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14. The Case Of The Absent Minded Professor
    29mins Aired 1945-03-15
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15. The Case Of The Glamorous Widow
    30mins Aired 1946-05-23
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16. Identical Twins Murder Case
    16mins Aired 1948-10-28
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17. The Case Of Murder and The Star Of Death
    28mins Aired 1949-06-09
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18. The Case Of Murder and The Bloodstained Necklace
    28mins Aired 1949-09-15
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19. The Yellow Talon Murder Case
    30mins Aired 1949-09-22
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20. The Case Of Murder With A Thousand Witnesses
    29mins Aired 1949-09-29
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21. The Case Of The Man Who Invented Death
    29mins Aired 1949-10-06
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22. The Silver Dagger Murder Case
    29mins Aired 1949-10-13
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23. The Case Of The Ruthless Murderers
    28mins Aired 1949-10-27
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24. The Forgotten Cave Murder Case
    29mins Aired 1949-11-03
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25. The Engaged Girl Murder Case
    29mins Aired 1949-11-10
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26. The Case Of The Rushville Murder
    29mins Aired 1950-01-05
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27. The Bride and Groom Murder Case
    25mins Aired 1950-01-19
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28. The Telephone Book Murder Case
    29mins Aired 1950-01-26
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29. The Case Of Murder and The Jewel Thief
    28mins Aired 1950-02-09
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30. The Case Of The Two Faced Murderer
    29mins Aired 1950-02-16
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31. The Case Of The Melody Of Murder
    29mins Aired 1950-03-09
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32. The Innocent Flirtation Murder Case
    28mins Aired 1950-03-16
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33. The Case Of The Murdered Detective
    29mins Aired 1950-04-06
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34. The Eccentric Millionaire Murder Case
    24mins Aired 1950-04-13
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35. The Country Club Murder Case
    29mins Aired 1950-04-20
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36. The Case Of The Woman Who Married A Murderer
    24mins Aired 1950-04-27
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37. The King Cobra Murder Case
    28mins Aired 1950-05-04
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38. The Case Of Murder and The Missing Car
    29mins Aired 1950-05-11
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39. The Broken Window Murder Case
    29mins Aired 1950-05-25
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40. The Quicksand Murder Case
    29mins Aired 1950-06-01
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41. The Skull and Crossbones Murder Case
    29mins Aired 1950-06-15
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42. The Case Of Murder and The Strange Woman
    29mins Aired 1951-07-20
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43. The Photograph Album Murder Case
    29mins Aired 1951-07-27
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44. The Case Of The Strange Murder Of Carrie Ellis
    29mins Aired 1951-08-03
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45. The Abandoned Well Murder Case
    28mins Aired 1951-08-10
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46. The Poisoned Sandwich Murder Case
    30mins Aired 1951-08-17
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47. The Case Of Murder At A Mile A Minute
    29mins Aired 1951-12-06
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48. The Silver Candlestick Murder Case
    29mins Aired 1952-03-13
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49. The Rented Cottage Murder Case
    28mins Aired 1952-04-03
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50. The Mother's Plea Murder Case
    29mins Aired 1952-04-10
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51. The Shrieking Prisoner Murder Case Part 1
    15mins Aired 1954-06-21
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52. The Shrieking Prisoner Murder Case Part 2
    15mins Aired 1954-06-23
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53. The Shrieking Prisoner Murder Case Part 3
    15mins Aired 1954-06-24
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54. The Shrieking Prisoner Murder Case Part 4
    15mins Aired 1954-06-25
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55. The Case Of Murder and The Revengeful Ghost
    26mins Aired 1955-02-22
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Mr. Keen, Tracer of Lost Persons was a captivating radio show that first premiered on the Blue Network. The program followed the story of a no-nonsense investigator, known only as Keen, who helps track down people who mysteriously vanish from their everyday lives. His trusty assistant Mike Clancy, a strong-willed Irishman, aids him in his disparate quests. The show evolved from its initial format as a thrice-weekly 15-minute serial, tackling baffling disappearances, to a humorous and entertaining program that saw Keen investigating murders in its half-hour week-long formula.

Broadcasted for 18 years, Mr. Keen, Tracer of Lost Persons aired from October 12, 1937, until September 26, 1955. It initially premiered on the Blue Network before transferring to CBS in 1942. Notable sponsors included Bisodol, Kolynos toothpaste, Chesterfield cigarettes, and American Chicle. Out of many episodes that aired during its run, nearly 60 recordings survive to this day for modern audiences to enjoy. The show's engaging format and memorable characters have made it popular with old-time radio fans even today.

Performers: Bennett Kilpack, Philip Clarke, Arthur Hughes, Jim Kelly

Sources: archive.org, wikipedia.org, otrcat.com