Season 4

1. Forged Plates

1954-09-30

2. International Diamond Smugglers

1954-10-07

3. The Boxing Game

1954-10-14

4. The Confidence Game

1954-10-21

5. The Empty Room

1954-10-28

6. The Third Partner

1954-11-04

7. International Robbery

1954-11-11

8. The Stamp Collector

1954-11-18

9. The Jewel Thief

1954-11-25

10. The Poisoned Teacup

1954-12-02

11. The Playful Prince

1954-12-09

12. Bullfighter's Woman

1954-12-16

13. The State Secrets

1954-12-23

14. The Speed Demons

1954-12-30

15. The Spy Ring

1955-01-06

16. Appointment at Five

1955-01-12

17. The Wayward Brother

1955-01-20

18. The Missing Schoolteacher

1955-01-27

19. Blind Man's Bluff

1955-02-03

20. The Mad Gunman

1955-02-10

21. The Diamond Allergy

1955-02-17

22. A Game of Chance

1955-02-24

23. The Pearl Necklace

1955-03-03

24. Two Men From Zurich

1955-03-10

25. The Broken Wishbone

1955-03-17

26. The Concert Pianist

1955-03-24

27. The Secret Plane

1955-03-31

28. The Boy in the Park

1955-04-07

29. Revenge

1955-04-14

30. The Diplomat

1955-04-21

31. Little Romeo

1955-04-28

32. Full Circle

1955-05-05

33. Big Brother

1955-05-14

34. Miss Fortune

1955-05-21

35. The Reluctant Killer

1955-06-02

36. The Beauty

1955-06-09

37. First Blush

1955-06-16

38. Runaround

1955-06-23

39. Delores

1955-06-30