Series 13
Episodes
1. Coils and Springs
1974-01-01
No overview available.
2. Opposites
1974-01-08
No overview available.
3. Signs and Signals
1974-01-15
No overview available.
4. Ghosties and Ghoulies
1974-01-22
No overview available.
5. Triangles
1974-01-29
No overview available.
6. Waves
1974-02-05
No overview available.
7. Food
1974-02-12
No overview available.
8. Windows
1974-02-19
No overview available.
9. Drips and Drops
1974-02-26
No overview available.
10. Humps and Lumps
1974-03-05
No overview available.
11. Air
1974-03-12
No overview available.
12. Growing
1974-03-19
No overview available.
13. Bags
1974-03-26
No overview available.
14. Spikes
1974-04-02
No overview available.
15. Episode 15
1974-04-09
No overview available.
16. Circles
1974-04-16
No overview available.
17. Reflections
1974-12-31
No overview available.
18. Episode 18
1975-01-14
No overview available.
19. Episode 19
1975-01-21
No overview available.
20. Episode 20
1975-01-28
No overview available.
21. Building
1975-02-04
No overview available.
22. Episode 22
1975-02-11
No overview available.
23. Space
1975-02-18
No overview available.
24. Games
1975-02-25
No overview available.
25. Episode 25
1975-03-04
No overview available.
26. Episode 26
1975-03-11
No overview available.
27. Episode 27
1975-03-18
No overview available.
28. Dark and Light
1975-03-25
No overview available.
29. Litter
1975-04-01
No overview available.
30. Zigzags
1975-04-08
No overview available.
31. Episode 31
1975-04-15
No overview available.
32. Wood
1975-04-22
No overview available.