Series 13

32 episodes · Jan 1, 1974

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S13E1

Coils and Springs

Jan 1, 1974

S13E2

Opposites

Jan 8, 1974

S13E3

Signs and Signals

Jan 15, 1974

S13E4

Ghosties and Ghoulies

Jan 22, 1974

S13E5

Triangles

Jan 29, 197425m

S13E6

Waves

Feb 5, 197425m

S13E7

Food

Feb 12, 1974

S13E8

Windows

Feb 19, 1974

S13E9

Drips and Drops

Feb 26, 197425m

S13E10

Humps and Lumps

Mar 5, 197425m

S13E11

Air

Mar 12, 1974

S13E12

Growing

Mar 19, 197425m

S13E13

Bags

Mar 26, 1974

S13E14

Spikes

Apr 2, 197425m

S13E15

Episode 15

Apr 9, 1974

S13E16

Circles

Apr 16, 197425m

S13E17

Reflections

Dec 31, 197425m

S13E18

Episode 18

Jan 14, 1975

S13E19

Episode 19

Jan 21, 1975

S13E20

Episode 20

Jan 28, 1975

S13E21

Building

Feb 4, 197525m

S13E22

Episode 22

Feb 11, 1975

S13E23

Space

Feb 18, 197525m

S13E24

Games

Feb 25, 197525m

S13E25

Episode 25

Mar 4, 1975

S13E26

Episode 26

Mar 11, 1975

S13E27

Episode 27

Mar 18, 1975

S13E28

Dark and Light

Mar 25, 197525m

S13E29

Litter

Apr 1, 197525m

S13E30

Zigzags

Apr 8, 197525m

S13E31

Episode 31

Apr 15, 1975

S13E32

Wood

Apr 22, 197525m