S18E09: Radioactive
Sandi Toksvig tunes in for a bit of 'Radio' activity.
Previous Episode 
Season 1
Adam
S1E1 / 11 Sep 2003
Astronomy
S1E2 / 18 Sep 2003
Aquatic Animals
S1E3 / 25 Sep 2003
Atoms
S1E4 / 02 Oct 2003
Advertising
S1E5 / 09 Oct 2003
Antidotes
S1E6 / 16 Oct 2003
Arthropods
S1E7 / 23 Oct 2003
Albania
S1E8 / 30 Oct 2003
Antelopes
S1E9 / 06 Nov 2003
Aviation
S1E10 / 13 Nov 2003
Arts
S1E11 / 20 Nov 2003
Advent
S1E12 / 25 Dec 2003
Season 2
Blue
S2E1 / 08 Oct 2004
Birds
S2E2 / 08 Oct 2004
Bombs
S2E3 / 15 Oct 2004
Bible
S2E4 / 22 Oct 2004
Bears
S2E5 / 29 Oct 2004
Beavers
S2E6 / 05 Nov 2004
Biscuits
S2E7 / 12 Nov 2004
Bees
S2E8 / 19 Nov 2004
Bats
S2E9 / 26 Nov 2004
Bills
S2E10 / 03 Dec 2004
Beats
S2E11 / 10 Dec 2004
Birth (Christmas special)
S2E12 / 17 Dec 2004
Season 3
Campanology
S3E1 / 30 Sep 2005
Cummingtonite
S3E2 / 30 Sep 2005
Common Knowledge
S3E3 / 07 Oct 2005
Cheating
S3E4 / 14 Oct 2005
Cat's Eyes
S3E5 / 21 Oct 2005
Cockneys
S3E6 / 28 Oct 2005
Constellations
S3E7 / 04 Nov 2005
Corby
S3E8 / 11 Nov 2005
Creatures
S3E9 / 18 Nov 2005
Cleve Crudgington
S3E10 / 25 Nov 2005
Carnival
S3E11 / 02 Dec 2005
Combustion
S3E12 / 09 Dec 2005
Season 4
Danger
S4E1 / 29 Sep 2006
Discoveries
S4E2 / 06 Oct 2006
Dogs
S4E3 / 13 Oct 2006
Dictionaries
S4E4 / 20 Oct 2006
Death (Halloween Special)
S4E5 / 27 Oct 2006
Drinks
S4E6 / 03 Nov 2006
Differences
S4E7 / 10 Nov 2006
Descendants (Children in Need Special)
S4E8 / 17 Nov 2006
Doves
S4E9 / 24 Nov 2006
Divination
S4E10 / 01 Dec 2006
Deprivation
S4E11 / 08 Dec 2006
Domesticity
S4E12 / 15 Dec 2006
December (Christmas Special)
S4E13 / 22 Dec 2006
Season 5
Engineering
S5E1 / 21 Sep 2007
Electricity
S5E2 / 21 Sep 2007
Eating
S5E3 / 28 Sep 2007
Exploration
S5E4 / 06 Oct 2007
Europe
S5E5 / 12 Oct 2007
Everything Etc
S5E6 / 19 Oct 2007
Espionage
S5E7 / 26 Oct 2007
Eyes and Ears
S5E8 / 02 Nov 2007
Entertainment
S5E9 / 09 Nov 2007
England
S5E10 / 16 Nov 2007
Endings
S5E11 / 23 Nov 2007
Empire
S5E12 / 07 Dec 2007
Elephants
S5E13 / 14 Dec 2007
Season 6
Families (Children in Need Special)
S6E1 / 14 Nov 2008
Fire and Freezing (Christmas Special)
S6E2 / 22 Dec 2008
Flotsam and Jetsam
S6E3 / 09 Jan 2009
Fight or Flight
S6E4 / 16 Jan 2009
France
S6E5 / 23 Jan 2009
Fakes and Frauds
S6E6 / 30 Jan 2009
Fingers and Fumbs
S6E7 / 06 Feb 2009
Fashion
S6E8 / 13 Feb 2009
The Future
S6E9 / 20 Feb 2009
Flora and Fauna
S6E10 / 27 Feb 2009
Film
S6E11 / 06 Mar 2009
Food
S6E12 / 20 Mar 2009
Season 7
Gardens
S7E1 / 26 Nov 2009
G-animals
S7E2 / 03 Dec 2009
Games
S7E3 / 10 Dec 2009
Geography
S7E4 / 17 Dec 2009
Groovy (Christmas Special)
S7E5 / 24 Dec 2009
Genius
S7E6 / 01 Jan 2010
Girls and Boys
S7E7 / 08 Jan 2010
Germany
S7E8 / 15 Jan 2010
Gallimaufrey
S7E9 / 22 Jan 2010
Greats
S7E10 / 29 Jan 2010
Gifts
S7E11 / 05 Feb 2010
Gravity
S7E12 / 12 Feb 2010
Gothic
S7E13 / 19 Feb 2010
Greeks
S7E14 / 05 Mar 2010
Green
S7E15 / 26 Mar 2010
Geometry
S7E16 / 02 Apr 2010
VG Part One
S7E17 / 05 Apr 2010
VG Part Two
S7E18 / 16 Apr 2010
Season 8
Hodge Podge
S8E1 / 17 Sep 2010
H Anatomy
S8E2 / 24 Sep 2010
Hoaxes
S8E3 / 01 Oct 2010
Humans
S8E4 / 08 Oct 2010
H-animals
S8E5 / 15 Oct 2010
Happiness
S8E6 / 22 Oct 2010
Horrible (Halloween Special)
S8E7 / 29 Oct 2010
Hypothetical
S8E8 / 05 Nov 2010
House and Home
S8E9 / 12 Nov 2010
Health and Safety
S8E10 / 26 Nov 2010
Highs and Lows
S8E11 / 03 Dec 2010
Horses and Hunting
S8E12 / 10 Dec 2010
Holidays
S8E13 / 17 Dec 2010
Hocus-Pocus (Christmas Special)
S8E14 / 24 Dec 2010
Hypnosis, Hallucinations & Hysteria
S8E15 / 07 Jan 2011
History
S8E16 / 14 Jan 2011
VG Part One
S8E17 / 25 Apr 2011
VG Part Two
S8E18 / 02 May 2011
Season 9
I-Spy
S9E1 / 09 Sep 2011
International
S9E2 / 16 Sep 2011
Imbroglio
S9E3 / 23 Sep 2011
Indecision
S9E4 / 30 Sep 2011
Invertebrates
S9E5 / 07 Oct 2011
Inventive
S9E6 / 14 Oct 2011
Incomprehensible
S9E7 / 21 Oct 2011
Inequality
S9E8 / 28 Oct 2011
Illness
S9E9 / 04 Nov 2011
Inland Revenue
S9E10 / 11 Nov 2011
Infantile
S9E11 / 18 Nov 2011
Illumination
S9E12 / 25 Nov 2011
Intelligence
S9E13 / 02 Dec 2011
VG Part 1
S9E14 / 16 Dec 2011
VG Part 2
S9E15 / 23 Dec 2011
Ice
S9E16 / 29 Dec 2011
Immortal Bard
S9E17 / 27 Apr 2012
Idleness
S9E18 / 04 May 2012
Season 10
Jargon
S10E1 / 14 Sep 2012
Jam, Jelly and Juice
S10E2 / 21 Sep 2012
Journeys
S10E3 / 28 Sep 2012
Jack and Jill
S10E4 / 05 Oct 2012
J-Places
S10E5 / 12 Oct 2012
Joints
S10E6 / 19 Oct 2012
Journalism
S10E7 / 26 Oct 2012
Jumble
S10E8 / 02 Nov 2012
Jeopardy
S10E9 / 09 Nov 2012
Jungles
S10E10 / 23 Nov 2012
Jumpers
S10E11 / 30 Nov 2012
Justice
S10E12 / 07 Dec 2012
Jobs
S10E13 / 14 Dec 2012
Jingle Bells
S10E14 / 21 Dec 2012
VG Part One
S10E15 / 28 Dec 2012VG Part Two
S10E16 / 04 Jan 2013
Jolly
S10E17 / 11 Jan 2013
Just the Job
S10E18 / 25 Aug 2013
Season 11
Knees & Knockers
S11E1 / 06 Sep 2013
Kit and Kaboodle
S11E2 / 13 Sep 2013
K-Folk
S11E3 / 20 Sep 2013
Knits & Knots
S11E4 / 27 Sep 2013
Kings
S11E5 / 04 Oct 2013
Killers
S11E6 / 11 Oct 2013
Knowledge
S11E7 / 18 Oct 2013
Keys
S11E8 / 25 Oct 2013
Kinetic
S11E9 / 01 Nov 2013
Keeps
S11E10 / 08 Nov 2013
Kinky
S11E11 / 29 Nov 2013
Knights and Knaves
S11E12 / 06 Dec 2013
Kitchen Sink
S11E13 / 13 Dec 2013
Kris Kringle
S11E14 / 24 Dec 2013
Kitsch
S11E15 / 10 Jan 2014
Kaleidoscope
S11E16 / 17 Jan 2014
VG Part One
S11E17 / 24 Jan 2014VG Part Two
S11E18 / 31 Jan 2014
Season 12
L-animals
S12E1 / 03 Oct 2014
Location, Location, Location
S12E2 / 10 Oct 2014
Literature
S12E3 / 17 Oct 2014
Levity
S12E4 / 24 Oct 2014
Lenses
S12E5 / 31 Oct 2014
Liblabble
S12E6 / 07 Nov 2014
Lethal
S12E7 / 21 Nov 2014
Lovely
S12E8 / 28 Nov 2014
Ladies and Gents
S12E9 / 05 Dec 2014
Lying
S12E10 / 12 Dec 2014
Lumped Together
S12E11 / 19 Dec 2014
No L
S12E12 / 25 Dec 2014
Lucky Losers
S12E13 / 02 Jan 2015
Little and Large
S12E14 / 09 Jan 2015
Long Lost
S12E15 / 16 Jan 2015
Landmarks
S12E16 / 23 Jan 2015
VG: Part One
S12E17 / 30 Jan 2015
VG: Part Two
S12E18 / 31 Jan 2015
Season 13
A Medley of Maladies
S13E1 / 16 Oct 2015
Military Matters
S13E2 / 23 Oct 2015
M-Places
S13E3 / 30 Oct 2015
Miscellany
S13E4 / 06 Nov 2015
Maths
S13E5 / 20 Nov 2015
Marriage and Mating
S13E6 / 27 Nov 2015
Middle Muddle
S13E7 / 11 Dec 2015
Merriment
S13E8 / 25 Dec 2015
Messing with Your Mind
S13E9 / 29 Dec 2015
Making a Meal of It
S13E10 / 08 Jan 2016
Menagerie
S13E11 / 15 Jan 2016
Medieval and Macabre
S13E12 / 22 Jan 2016
Monster Mash
S13E13 / 29 Jan 2016
Messy
S13E14 / 05 Feb 2016
Mix and Match
S13E15 / 12 Feb 2016
Misconceptions
S13E16 / 19 Feb 2016
VG: Part One
S13E17 / 04 Mar 2016
VG: Part Two
S13E18 / 25 Mar 2016
Season 14
Naming Names
S14E1 / 21 Oct 2016
North Norse
S14E2 / 28 Oct 2016
Nosey Noisy
S14E3 / 04 Nov 2016
Noble Rot
S14E4 / 11 Nov 2016
Not Nearly
S14E5 / 25 Nov 2016
Night
S14E6 / 02 Dec 2016
Naked Truth
S14E7 / 09 Dec 2016
Non Sequiturs
S14E8 / 16 Dec 2016
Noel
S14E9 / 22 Dec 2016
Nature/Nurture
S14E10 / 30 Dec 2016
Nonsense
S14E11 / 06 Jan 2017
Noodles
S14E12 / 13 Jan 2017
Naval Navigation
S14E13 / 20 Jan 2017
Numbers
S14E14 / 27 Jan 2017
Next
S14E15 / 03 Feb 2017
New
S14E16 / 10 Feb 2017
VG: Part One
S14E17 / 17 Feb 2017
VG: Part Two
S14E18 / 24 Feb 2017
Season 15
Ologies
S15E1 / 20 Oct 2017
Organisms
S15E2 / 27 Oct 2017
Oceans
S15E3 / 03 Nov 2017
Over and Ova
S15E4 / 10 Nov 2017
Odorous and Odious
S15E5 / 24 Nov 2017
Odds and Ends
S15E6 / 01 Dec 2017
Opposites
S15E7 / 08 Dec 2017
Operations
S15E8 / 15 Dec 2017
O Christmas
S15E9 / 26 Dec 2017
Origins and Openings
S15E10 / 05 Jan 2018
Objects and Ornaments
S15E11 / 12 Jan 2018
The Occult
S15E12 / 19 Jan 2018
Omnishambles
S15E13 / 26 Jan 2018
Oddballs
S15E14 / 02 Feb 2018
Occupations and Offices
S15E15 / 09 Feb 2018
Overseas
S15E16 / 16 Feb 2018
VG Part One
S15E17 / 23 Feb 2018
VG Part Two
S15E18 / 02 Mar 2018
Season 16
P-animals
S16E1 / 10 Sep 2018
Peril
S16E2 / 17 Sep 2018
Piecemeal
S16E3 / 24 Sep 2018
Parts
S16E4 / 01 Oct 2018
Public & Private
S16E5 / 08 Oct 2018
Pictures
S16E6 / 15 Oct 2018
Picnics
S16E7 / 22 Oct 2018
Plants
S16E8 / 29 Oct 2018
Pubs
S16E9 / 18 Dec 2018
Pain & Punishment
S16E10 / 11 Jan 2019
Potpourri
S16E11 / 18 Jan 2019
Procrastination
S16E12 / 25 Jan 2019
Phenomena
S16E13 / 01 Feb 2019
Pathological
S16E14 / 08 Feb 2019
Past Times
S16E15 / 15 Feb 2019
Post
S16E16 / 22 Feb 2019
VG Part One
S16E17 / 01 Mar 2019
VG Part Two
S16E18 / 08 Mar 2019
Season 17
Quirky
S17E1 / 06 Sep 2019
Quintessential
S17E2 / 13 Sep 2019
Quarrels
S17E3 / 20 Sep 2019
Queasy Quacks
S17E4 / 27 Sep 2019
Questions and Qualifications
S17E5 / 04 Oct 2019
Quests (1)
S17E6 / 11 Oct 2019
Quests (2)
S17E7 / 18 Oct 2019
Qanimals
S17E8 / 25 Oct 2019
Quizmas
S17E9 / 24 Dec 2019
Quiet
S17E10 / 03 Jan 2020
Quaffing
S17E11 / 10 Jan 2020
Quagmire
S17E12 / 17 Jan 2020
Quills
S17E13 / 24 Jan 2020
Queens
S17E14 / 31 Jan 2020
Quantity and Quality
S17E15 / 07 Feb 2020
Quads and Quins
S17E16 / 14 Feb 2020
VG: Part I
S17E17 / 21 Feb 2020
VG: Part II
S17E18 / 28 Feb 2020
Season 18
Rude
S18E1 / 28 May 2020
Ruff and Ready
S18E2 / 04 Jun 2020
Road and Rail
S18E3 / 11 Jun 2020
Restaurants
S18E4 / 18 Jun 2020
Rubbish
S18E5 / 25 Jun 2020
Ridiculous
S18E6 / 02 Jul 2020
Revolutions
S18E7 / 09 Jul 2020
Reflections
S18E8 / 16 Jul 2020
Radioactive
S18E9 / 23 Jul 2020
Rest & Recreation
S18E10 / 30 Jul 2020
Roaming
S18E11 / 06 Aug 2020
Rejoice! A Christmas Special
S18E12 / 23 Dec 2020
Rogue
S18E13 / 14 Jan 2021
Random
S18E14 / 21 Jan 2021
Rock 'n' Roll
S18E15 / 28 Jan 2021
R Animals
S18E16 / 27 Mar 2021
Season 19
Sick
S19E1 / 09 Sep 2021
Secrets, Spies & Sleuths
S19E2 / 16 Sep 2021
Shady & Shaky
S19E3 / 23 Sep 2021
Sideshows, Stunts & Scavenger Hunts
S19E4 / 30 Sep 2021
Sugar & Spice
S19E5 / 07 Oct 2021
Sensational
S19E6 / 14 Oct 2021
Spooky
S19E7 / 21 Oct 2021
Seasons Greetings
S19E8 / 20 Dec 2021
S Animals
S19E9 / 07 Jan 2022
Smörgåsbord
S19E10 / 14 Jan 2022
Saints & Sinners
S19E11 / 21 Jan 2022
Silly Season
S19E12 / 28 Jan 2022
Sun, Sea & Sandi
S19E13 / 04 Feb 2022
Sexed-Up
S19E14 / 11 Feb 2022
VG: Part I
S19E15 / 15 Feb 2022
VG: Part II
S19E16 / 22 Feb 2022
Season 20
Tips and Tools
S20E1 / 11 Nov 2022
'T' Animals
S20E2 / 18 Nov 2022
Television
S20E3 / 25 Nov 2022
Thrills & Spills
S20E4 / 02 Dec 2022
Testing
S20E5 / 09 Dec 2022
Tricks & Treats
S20E6 / 16 Dec 2022
Toys, Tinsel, and Turkeys
S20E7 / 19 Dec 2022
Ticks Tax Toes
S20E8 / 09 Jan 2023
Theatrical!
S20E9 / 16 Jan 2023
Telling Tails
S20E10 / 23 Jan 2023
Trundling
S20E11 / 30 Jan 2023
This, That and the Other
S20E12 / 06 Feb 2023
Tubular
S20E13 / 13 Feb 2023
Tea Time
S20E14 / 21 Feb 2023
VG: Part 1
S20E15 / 24 Feb 2023
VG: Part 2
S20E16 / 03 Mar 2023
Season 21
All I Want For Christmas Is U
S21E1 / 18 Dec 2023
Upside-Down
S21E2 / 05 Jan 2024
United
S21E3 / 12 Jan 2024
Unsavoury
S21E4 / 19 Jan 2024
Uncle Sam
S21E5 / 26 Jan 2024
Ultras
S21E6 / 06 Feb 2024
Ufology
S21E7 / 13 Feb 2024
'U' Animals
S21E8 / 20 Feb 2024
Unrelated
S21E9 / 27 Feb 2024
Upsadaisy
S21E10 / 26 Mar 2024
Underthings
S21E11 / 02 Apr 2024
University
S21E12 / 09 Apr 2024
Upbringing
S21E13 / 16 Apr 2024
Underground and Underwater
S21E14 / 23 Apr 2024
Ulex
S21E15 / 30 Apr 2024
VG: Part 1
S21E16 / 10 May 2024
VG: Part 2
S21E17 / 17 May 2024
Season 22
Voyaging
S22E1 / 22 Oct 2024
Vocal
S22E2 / 29 Oct 2024
Very Varied
S22E3 / 05 Nov 2024
Vets
S22E4 / 12 Nov 2024
Visual
S22E5 / 19 Nov 2024
Volatile
S22E6 / 26 Nov 2024
Visionaries
S22E7 / 03 Dec 2024
Viral
S22E8 / 10 Dec 2024
Variety
S22E9 / 17 Dec 2024
Vulgar
S22E10 / 31 Dec 2024
Vintage
S22E11 / 07 Jan 2025
Vices and Virtues
S22E12 / 14 Jan 2025
Veggies
S22E13 / 21 Jan 2025
Victory
S22E14 / 25 Feb 2025
VG: Part 1
S22E15 / 10 Feb 2025
VG: Part 2
S22E16 / 17 Feb 2025
Season 23
Wales, Whales and Wails
S23E1 / 21 Oct 2025
Wings and Wheels
S23E2 / 28 Oct 2025
Weaponry
S23E3 / 04 Nov 2025
Wavey
S23E4 / 11 Nov 2025
Wild West
S23E5 / 25 Nov 2025
Wooing
S23E6 / 02 Dec 2025
Who What Why?
S23E7 / 09 Dec 2025
Weird and Wonderful
S23E8 / 16 Dec 2025
Winter Wonderland
S23E9 / 23 Dec 2025
‘W’ Animals
S23E10 / 06 Jan 2026
Wet and Windy
S23E11 / 13 Jan 2026
Willy Nilly
S23E12 / 20 Jan 2026
Wordmongery
S23E13 / 27 Jan 2026
Whatnots
S23E14 / 03 Feb 2026
VG: Part 1
S23E15 / 10 Feb 2026
VG: Part 2
S23E16 / 17 Feb 2026
Sandi Toksvig
Self - Presenter
