September 30, 1954

Season 4

01. Forged Plates

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September 30, 1954

02. International Diamond Smugglers

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October 7, 1954

03. The Boxing Game

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October 14, 1954

04. The Confidence Game

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October 21, 1954

05. The Empty Room

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October 28, 1954

06. The Third Partner

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November 4, 1954

07. International Robbery

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November 11, 1954

08. The Stamp Collector

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November 18, 1954

09. The Jewel Thief

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November 25, 1954

10. The Poisoned Teacup

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December 2, 1954

11. The Playful Prince

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December 9, 1954

12. Bullfighter's Woman

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December 16, 1954

13. The State Secrets

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December 23, 1954

14. The Speed Demons

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December 30, 1954

15. The Spy Ring

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January 6, 1955

16. Appointment at Five

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January 12, 1955

17. The Wayward Brother

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January 20, 1955

18. The Missing Schoolteacher

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January 27, 1955

19. Blind Man's Bluff

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February 3, 1955

20. The Mad Gunman

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February 10, 1955

21. The Diamond Allergy

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February 17, 1955

22. A Game of Chance

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February 24, 1955

23. The Pearl Necklace

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March 3, 1955

24. Two Men From Zurich

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March 10, 1955

25. The Broken Wishbone

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March 17, 1955

26. The Concert Pianist

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March 24, 1955

27. The Secret Plane

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March 31, 1955

28. The Boy in the Park

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April 7, 1955

29. Revenge

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April 14, 1955

30. The Diplomat

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April 21, 1955

31. Little Romeo

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April 28, 1955

32. Full Circle

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May 5, 1955

33. Big Brother

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May 14, 1955

34. Miss Fortune

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May 21, 1955

35. The Reluctant Killer

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June 2, 1955

36. The Beauty

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June 9, 1955

37. First Blush

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June 16, 1955

38. Runaround

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June 23, 1955

39. Delores

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June 30, 1955