| Season 1 |
| 6 November 2006 |
Season 1, Episode 0: Pilot
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| 11 September 2003 |
Season 1, Episode 1: Adam
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| 11 September 2003 |
Season 1, Episode 2: Astronomy
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| 18 September 2003 |
Season 1, Episode 3: Aquatic Animals
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| 25 September 2003 |
Season 1, Episode 4: Atoms
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| 2 October 2003 |
Season 1, Episode 5: Advertising
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| 9 October 2003 |
Season 1, Episode 6: Antidotes
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| 16 October 2003 |
Season 1, Episode 7: Arthropods
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| 23 October 2003 |
Season 1, Episode 8: Albania
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| 30 October 2003 |
Season 1, Episode 9: Africa
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| 6 November 2003 |
Season 1, Episode 10: Alan
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| 13 November 2003 |
Season 1, Episode 11: Arts
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| 23 December 2003 |
Season 1, Episode 12: Advent
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| Season 2 |
| 8 October 2004 |
Season 2, Episode 1: Blue
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| 8 October 2004 |
Season 2, Episode 2: Birds
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| 15 October 2004 |
Season 2, Episode 3: Bombs
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| 22 October 2004 |
Season 2, Episode 4: Bible
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| 29 October 2004 |
Season 2, Episode 5: Bears
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| 5 November 2004 |
Season 2, Episode 6: Beavers
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| 12 November 2004 |
Season 2, Episode 7: Biscuits
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| 19 November 2004 |
Season 2, Episode 8: Bees
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| 26 November 2004 |
Season 2, Episode 9: Bats
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| 3 December 2004 |
Season 2, Episode 10: Bills
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| 10 December 2004 |
Season 2, Episode 11: Beats
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| 17 December 2004 |
Season 2, Episode 12: Birth
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| Season 3 |
| 30 September 2005 |
Season 3, Episode 1: Campanology
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| 30 September 2005 |
Season 3, Episode 2: Cummingtonite
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| 7 October 2005 |
Season 3, Episode 3: Common Knowledge
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| 14 October 2005 |
Season 3, Episode 4: Cheating
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| 21 October 2005 |
Season 3, Episode 5: Cat's Eyes
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| 28 October 2005 |
Season 3, Episode 6: Cockneys
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| 4 November 2005 |
Season 3, Episode 7: Constellations
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| 11 November 2005 |
Season 3, Episode 8: Corby
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| 18 November 2005 |
Season 3, Episode 9: Creatures
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| 25 November 2005 |
Season 3, Episode 10: Cleve Crudgington
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| 2 December 2005 |
Season 3, Episode 11: Carnival
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| 9 December 2005 |
Season 3, Episode 12: Combustion
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| Season 4 |
| 29 September 2006 |
Season 4, Episode 1: Danger
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| 29 September 2006 |
Season 4, Episode 2: Discoveries
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| 6 October 2006 |
Season 4, Episode 3: Dogs
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| 13 October 2006 |
Season 4, Episode 4: Dictionaries
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| 20 October 2006 |
Season 4, Episode 5: Death
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| 27 October 2006 |
Season 4, Episode 6: Drinks
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| 3 November 2006 |
Season 4, Episode 7: Differences
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| 10 November 2006 |
Season 4, Episode 8: Descendants
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| 17 November 2006 |
Season 4, Episode 9: Doves
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| 24 November 2006 |
Season 4, Episode 10: Divination
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| 1 December 2006 |
Season 4, Episode 11: Denial & Deprivation
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| 8 December 2006 |
Season 4, Episode 12: Domesticity
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| 15 December 2006 |
Season 4, Episode 13: December
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| Season 5 |
| 21 September 2007 |
Season 5, Episode 1: Engineering
|
| 21 September 2007 |
Season 5, Episode 2: Electricity
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| 28 September 2007 |
Season 5, Episode 3: Eating
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| 5 October 2007 |
Season 5, Episode 4: Exploration
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| 12 October 2007 |
Season 5, Episode 5: Europe
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| 19 October 2007 |
Season 5, Episode 6: Everything
|
| 26 October 2007 |
Season 5, Episode 7: Espionage
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| 2 November 2007 |
Season 5, Episode 8: Eyes and Ears
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| 9 November 2007 |
Season 5, Episode 9: Entertainment
|
| 16 November 2007 |
Season 5, Episode 10: England
|
| 23 November 2007 |
Season 5, Episode 11: Endings
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| 7 December 2007 |
Season 5, Episode 12: Empire
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| 14 December 2007 |
Season 5, Episode 13: Elephants
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| Season 6 |
| 14 November 2008 |
Season 6, Episode 1: Families
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| 22 December 2008 |
Season 6, Episode 2: Fire & Freezing
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| 9 January 2009 |
Season 6, Episode 3: Flotsam & Jetsam
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| 16 January 2009 |
Season 6, Episode 4: Fight or Flight
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| 23 January 2009 |
Season 6, Episode 5: France
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| 30 January 2009 |
Season 6, Episode 6: Fakes & Frauds
|
| 6 February 2009 |
Season 6, Episode 7: Fingers and Fumbs
|
| 13 February 2009 |
Season 6, Episode 8: Fashion
|
| 20 February 2009 |
Season 6, Episode 9: Future
|
| 27 February 2009 |
Season 6, Episode 10: Flora and Fauna
|
| 6 March 2009 |
Season 6, Episode 11: Film
|
| 20 March 2009 |
Season 6, Episode 12: Food
|
| Season 7 |
| 26 November 2009 |
Season 7, Episode 1: Gardens
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| 3 December 2009 |
Season 7, Episode 2: G-Animals
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| 10 December 2009 |
Season 7, Episode 3: Games
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| 17 December 2009 |
Season 7, Episode 4: Geography
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| 24 December 2009 |
Season 7, Episode 5: Groovy
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| 31 December 2009 |
Season 7, Episode 6: Genius
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| 8 January 2010 |
Season 7, Episode 7: Girls and Boys
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| 15 January 2010 |
Season 7, Episode 8: Germany
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Season 7, Episode 9: A Gallimaufrey of Gingambobs
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| 29 January 2010 |
Season 7, Episode 10: Greatness
|
| 5 Feb 2010 |
Season 7, Episode 11: Gifts
|
| 11 Feb 2010 |
Season 7, Episode 12: Gravity
|
| 19 Feb 2010 |
Season 7, Episode 13: Gothic
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| 26 Mar 2010 |
Season 7, Episode 15: Green
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| 2 Apr 2010 |
Season 7, Episode 16: Geometry
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| 5 Apr 2010 |
Season 7, Episode 17: Compilation
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| Season 9 |
| 9 Sep 2011 |
Season 9, Episode 1: I-Spy
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| Season 9 |
| 16 Sep 2011 |
Season 9, Episode 2: International
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| 23 Sep 2011 |
Season 9, Episode 3: Imbroglio
|
| 30 Sep 2011 |
Season 9, Episode 4: Indecision
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| 7 Oct 2011 |
Season 9, Episode 5: Invertebrates
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| 14 Oct 2011 |
Season 9, Episode 6: Inventive
|
| 21 Oct 2011 |
Season 9, Episode 7: Incomprehensible
|
| 28 Oct 2011 |
Season 9, Episode 8: Inequality
|
| 4 Nov 2011 |
Season 9, Episode 9: Illness
|
| 19 Nov 2011 |
Season 9, Episode 11: Infantile (Children in Need Special)
|
| 25 Nov 2011 |
Season 9, Episode 12: Illumination
|
| 2 Dec 2011 |
Season 9, Episode 13: Idleness
|
| 9 Dec 2011 |
Season 9, Episode 14: The Immortal Bard
|
| 16 Dec 2011 |
Season 9, Episode 15: Intelligence
|
| 23 Dec 2011 |
Season 9, Episode 16: Icy (Christmas Special)
|
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Season 9, Episode 17: The Immortal Bard
|
| Season 10 |
|
Season 10, Episode 1:
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Season 10, Episode 2:
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Season 10, Episode 3:
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Season 10, Episode 4:
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Season 10, Episode 5:
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Season 10, Episode 6:
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Season 10, Episode 8:
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Season 10, Episode 9:
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Season 10, Episode 10:
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Season 10, Episode 11: Jumpers
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Season 10, Episode 12: Justice
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| Season 16 |
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Season 16, Episode 1: Panimals
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| Season 16 |
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Season 16, Episode 2: Peril
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| Season 16 |
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Season 16, Episode 3: Piecemeal
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| Season 16 |
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Season 16, Episode 4: Parts
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| Season 16 |
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Season 16, Episode 5: Public and Private
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| Season 16 |
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Season 16, Episode 6: Pictures
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Season 16, Episode 7: Picnics
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Season 16, Episode 8: Plants
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