Beginning in 1965, the BBC's flagship science programme ran for nearly 40 years. Its mix of quirky film reports and live experiments examined the changing state of current technology and put new inventions to the test.
| Season | From | To | Episodes |
|---|---|---|---|
| All Seasons | |||
| Specials | December 1975 | November 2018 | 7 |
| Season 1 | July 1965 | November 1965 | 31 |
| Season 2 | 22 | ||
| Season 11 | December 1975 | 1 | |
| Season 15 | December 1979 | July 1980 | 2 |
| Season 17 | October 1982 | December 1982 | 2 |
| Season 20 | March 1983 | 1 | |
| Season 21 | May 1986 | 1 | |
| Season 22 | December 1986 | January 1987 | 3 |
| Season 23 | January 1988 | 1 | |
| Season 25 | September 1989 | April 1990 | 2 |
| Season 26 | September 1990 | March 1991 | 5 |
| Season 28 | February 1993 | November 1993 | 2 |
| Season 30 | May 1995 | June 1995 | 2 |
| Season 32 | November 1994 | 1 | |
| Season 36 | July 2001 | 1 | |
| Season 37 | December 1999 | December 1999 | 3 |
| Season 38 | November 2001 | November 2001 | 2 |
| Season 39 | March 2002 | June 2002 | 3 |
| Unassigned Episodes | 0 |
| Season | From | To | Episodes |
|---|---|---|---|
| Specials | 0 | ||
| Unassigned Episodes | 92 |
| Season | From | To | Episodes |
|---|---|---|---|
| Season 1 | 0 | ||
| Unassigned Episodes | 92 |
No actors for this record.
| Name | Number of Episodes | Dates | |
|---|---|---|---|
| Bob Bootle | 1 | 12/23/1975 |
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