Season 1
- 1Materials12 Apr 1979
- 2Water19 Apr 1979
- 3The Shape of Wealth26 Apr 1979
- 4Episode 43 May 1979
- 5Episode 510 May 1979
- 6Episode 617 May 1979
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Think of a number
Fun but instructive science lectures from Johnny Ball in his first of many children's factual series.
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Seasons (6)
Season 2
- 1Episode 112 Sep 1979
- 2Episode 219 Sep 1979
- 3Episode 326 Sep 1979
- 4Episode 43 Oct 1979
- 5Episode 510 Oct 1979
- 6Episode 617 Oct 1979
Season 3
- 1Episode 110 Sep 1980
- 2Episode 217 Sep 1980
- 3Episode 324 Sep 1980
- 4Episode 41 Oct 1980
- 5Episode 58 Oct 1980
- 6Episode 615 Oct 1980
Season 4
- 1Episode 115 Sep 1982
- 2Episode 222 Sep 1982
- 3Episode 329 Sep 1982
- 4Episode 46 Oct 1982
- 5Episode 513 Oct 1982
- 6Episode 620 Oct 1982
Season 5
- 1Episode 14 Jan 1984
- 2Episode 211 Jan 1984
- 3Episode 318 Jan 1984
- 4Episode 4.25 Jan 1984
- 5Episode 51 Feb 1984
- 6Episode 68 Feb 1984
Season 6
- 1Episode 126 Sep 1984
- 2Episode 23 Oct 1984
- 3Episode 310 Oct 1984
- 4Episode 417 Oct 1984
- 5Episode 524 Oct 1984
- 6Episode 631 Oct 1984