Series 13
(1974)
Episodes
Coils and Springs 0.0
January 1, 1974
Opposites 0.0
January 8, 1974
Signs and Signals 0.0
January 15, 1974
Ghosties and Ghoulies 0.0
January 22, 1974
Triangles 0.0
January 29, 1974
Waves 0.0
February 5, 1974
Food 0.0
February 12, 1974
Windows 0.0
February 19, 1974
Drips and Drops 0.0
February 26, 1974
Humps and Lumps 0.0
March 5, 1974
Air 0.0
March 12, 1974
Growing 0.0
March 19, 1974
Bags 0.0
March 26, 1974
Spikes 0.0
April 2, 1974
Episode 15 0.0
April 9, 1974
Circles 0.0
April 16, 1974
Reflections 0.0
December 31, 1974
Episode 18 0.0
January 14, 1975
Episode 19 0.0
January 21, 1975
Episode 20 0.0
January 28, 1975
Building 0.0
February 4, 1975
Episode 22 0.0
February 11, 1975
Space 0.0
February 18, 1975
Games 0.0
February 25, 1975
Episode 25 0.0
March 4, 1975
Episode 26 0.0
March 11, 1975
Episode 27 0.0
March 18, 1975
Dark and Light 0.0
March 25, 1975
Litter 0.0
April 1, 1975
Zigzags 0.0
April 8, 1975
Episode 31 0.0
April 15, 1975
Wood 0.0
April 22, 1975