Season 4

1. Forged Plates

2. International Diamond Smugglers

3. The Boxing Game

4. The Confidence Game

5. The Empty Room

6. The Third Partner

7. International Robbery

8. The Stamp Collector

9. The Jewel Thief

10. The Poisoned Teacup

11. The Playful Prince

12. Bullfighter's Woman

13. The State Secrets

14. The Speed Demons

15. The Spy Ring

16. Appointment at Five

17. The Wayward Brother

18. The Missing Schoolteacher

19. Blind Man's Bluff

20. The Mad Gunman

21. The Diamond Allergy

22. A Game of Chance

23. The Pearl Necklace

24. Two Men From Zurich

25. The Broken Wishbone

26. The Concert Pianist

27. The Secret Plane

28. The Boy in the Park

29. Revenge

30. The Diplomat

31. Little Romeo

32. Full Circle

33. Big Brother

34. Miss Fortune

35. The Reluctant Killer

36. The Beauty

37. First Blush

38. Runaround

39. Delores