Series 4

1. Episode 223 (Mon 6th Jan 1975)

2. Episode 224 (Tues 7th Jan 1975)

3. Episode 225 (Mon 13th Jan 1975)

4. Episode 226 (Tue 14th Jan 1975)

5. Episode 227 (Mon 20th Jan 1975)

6. Episode 228 (Tue 21st Jan 1975)

7. Episode 229 (Mon 27th Jan 1975)

8. Episode 230 (Tue 28th Jan 1975)

9. Episode 231 (Mon 3rd Feb 1975)

10. Episode 232 (Tue 4th Feb 1975)

11. Episode 233 (Mon 10th Feb 1975)

12. Episode 234 (Tue 11th Feb 1975)

13. Episode 235 (Mon 17th Feb 1975)

14. Episode 236 (Tue 18th Feb 1975)

15. Episode 237 (Mon 24th Feb 1975)

16. Episode 238 (Tue 25th Feb 1975)

17. Episode 239 (Mon 3rd March 1975)

18. Episode 240 (Tues 4th March 1975)

19. Episode 241 (Mon 10th March 1975)

20. Episode 242 (Tue 11th March 1975)

21. Episode 243 (Mon 17th March 1975)

22. Episode 244 (Tue 18th March 1975)

23. Episode 245 (Mon 24th March 1975)

24. Episode 246 (Tue 25th March 1975)

25. Episode 247 (Mon 7th April 1975)

26. Episode 248 (Tue 8th April 1975)

27. Episode 249 (Mon 14th April 1975)

28. Episode 250 (Tue 15th April 1975)

29. Episode 251 (Mon 21st April 1975)

30. Episode 252 (Tue 22nd April 1975)

31. Episode 253 (Mon 28th April 1975)

32. Episode 254 (Tue 29th April 1975)

33. Episode 255 (Mon 5th May 1975)

34. Episode 256 (Tue 6th May 1975)

35. Episode 257 (Mon 12th May 1975)

36. Episode 258 (Tue 13th May 1975)

37. Episode 259 (Mon 19th May 1975)

38. Episode 260 (Tue 20th May 1975)

39. Episode 261 (Mon 13th Oct 1975)

40. Episode 262 (Tue 14th Oct 1975)

41. Episode 263 (Mon 20th Oct 1975)

42. Episode 264 (Tue 21st Oct 1975)

43. Episode 265 (Mon 27th Oct 1975)

44. Episode 266 (Tue 28th Oct 1975)

45. Episode 267 (Mon 3rd Nov 1975)

46. Episode 268 (Tue 4th Nov 1975)

47. Episode 269 (Mon 10th Nov 1975)

48. Episode 270 (Tue 11th Nov 1975)

49. Episode 271 (Mon 17th Nov 1975)

50. Episode 272 (Tue 18th Nov 1975)

51. Episode 273 (Mon 24th Nov 1975)

52. Episode 274 (Tue 25th Nov 1975)

53. Episode 275 (Mon 1st Dec 1975)

54. Episode 276 (Tue 2nd Dec 1975)

55. Episode 277 (Mon 8th Dec 1975)

56. Episode 278 (Tue 9th Dec 1975)

57. Episode 279 (Mon 15th Dec 1975)

58. Episode 280 (Tue 16th Dec 1975)

59. Episode 281 (Mon 22nd Dec 1975)

60. Episode 282 (Tue 23rd Dec 1975)

61. Episode 283 (Mon 29th Dec 1975)

62. Episode 284 (Tue 30th Dec 1975)