Think of a Number - Episode Guide

Episode: 1x01 | Airdate: Apr 12, 1979 (25 min)

Johnny Ball looks at family trees, boomerangs and nylon, and turns a fossil back into a dinosaur!

Episode: 1x02 | Airdate: Apr 19, 1979 (25 min)

In this edition, the theme is water. Johnny Ball considers icebergs, soap bubbles, model divers and John Lethbridge's early diving bell.

Episode: 1x03 | Airdate: Apr 26, 1979 (25 min)

Johnny Ball introduces a focus on wealth, including a giant Roll a Penny game, dice, diamonds, the Crown Jewels and gold bars.

Episode: 1x04 | Airdate: May 3, 1979

Episode: 1x05 | Airdate: May 10, 1979

Episode: 1x06 | Airdate: May 17, 1979

Episode: 2x01 | Airdate: Sep 12, 1979

Episode: 2x02 | Airdate: Sep 19, 1979

Episode: 2x03 | Airdate: Sep 26, 1979

Episode: 2x04 | Airdate: Oct 3, 1979

Episode: 2x05 | Airdate: Oct 10, 1979

Episode: 2x06 | Airdate: Oct 17, 1979

Episode: 3x01 | Airdate: Sep 10, 1980

Episode: 3x02 | Airdate: Sep 17, 1980

Episode: 3x03 | Airdate: Sep 24, 1980

Episode: 3x04 | Airdate: Oct 1, 1980

Episode: 3x05 | Airdate: Oct 8, 1980

Episode: 3x06 | Airdate: Oct 15, 1980

Episode: 4x01 | Airdate: Sep 15, 1982

Episode: 4x02 | Airdate: Sep 22, 1982

Episode: 4x03 | Airdate: Sep 29, 1982

Episode: 4x04 | Airdate: Oct 6, 1982

Episode: 4x05 | Airdate: Oct 13, 1982

Episode: 4x06 | Airdate: Oct 20, 1982

Episode: 5x01 | Airdate: Jan 4, 1984

Episode: 5x02 | Airdate: Jan 11, 1984

Episode: 5x03 | Airdate: Jan 18, 1984

Episode: 5x04 | Airdate: Jan 25, 1984

Episode: 5x05 | Airdate: Feb 1, 1984

Episode: 5x06 | Airdate: Feb 8, 1984

Episode: 6x01 | Airdate: Sep 26, 1984

Episode: 6x02 | Airdate: Oct 3, 1984

Episode: 6x03 | Airdate: Oct 10, 1984

Episode: 6x04 | Airdate: Oct 17, 1984

Episode: 6x05 | Airdate: Oct 24, 1984

Episode: 6x06 | Airdate: Oct 31, 1984