All episodes
Why does my hair look grey?
You never see a seagull in a tree?
Welcome to James O'Brien Plus
My dogs' strange relationship with the butchers?
Isn't this a motoring question?
Why is three the magic number?
How did ancient buildings end up buried?
Who's filtering these callers?
What makes a crisp a crisp?
I've got to smell my dog's paws
What's the point of bay leaves?
Smallest living thing in the human body?
Why can we smell rain before it falls?
Why does posh slang stay the same?
Walking around in a see-through dress?
Harmonica making my dog howl
Do crabs have a dominant claw?
Are my polished nails suffocating?
Do birds herd sheep?
Ducks in the sea?
Can mosquitoes get drunk?
Why is popcorn a cinema snack?
How do football commentators remember players?
When did people start Mexican waving?
Why are slugs coming for my dishwasher?
Why has my bagel got a hole in it?
What colour is his ball?
Why is the luggage all over the place?
Easter eggs: what's all that about?
Why are there so many breads?
Why don't I burn when I'm cycling?
Why are letters shaped like that?
Sniffing empty bottles?
Why is my hamster so ungrateful?
Where did they get the water from for the canals?
Why won't my glasses blow off?
An insult to science
Can you feel the tension in a room?
Is some music too hard to play?
My kitten won't listen to me
Mystery Hour Travel Edition: It's in a tin
How genetically related am I to Farage?
Raw meat, leaves and that?
Who invented the suit?
Where did "Geordies" come from?
A major induction hobs dispute
Unbelievable bee content
The truth about Guinness
Big Boxer's Beards
Why do journalists shout questions on Downing Street?
One question hijacks Mystery Hour
Running the marathon with a fridge
Where are the acorn trees?
What should I do with this pigeon?
The tyranny of the picture frame
Why does the UK have only one time zone?
Why is there a pink pigeon?
How do spiders get in and out of a bathtub?
How do train drivers get to work?
Why is my washing machine lying to me?
Does the world get heavier?
What happens when you lose a finger?
My kids love getting dizzy
Why can't I hear my accent?
Why peeling an egg can get chaotic
Have I got a superpower?
Where do geese go?
Cats, dogs and... ferrets?
Where do the rocket boosters end up?
Why don't you get savoury drinks?
What does my phone know about me?
Red sky at night, shepherd's delight
Cinnamon sneezes and soggy biscuits
A lot of horsing around
How we know the colours of dinosaurs
I haven't got the physics
Mountains and molehills
Eating the same breakfast over and over again
Some smells are better than others
The greater and lesser spotted
You end up with a fish at the end
Isn't that a motoring question?
Why is there only one human species?
Sandwiches are for WIMPS
Where do those babies come from?
I can see a rainbow
What counts as 'old skool'?
Simples or haggis?
Why are so many barbers Turkish?
Slugs up mountains
Has it got windier?
Who washes planes?
Why is boarding a plane so chaotic?
Caller has lots of apologising to do
Being rubbish at physics is not funny
Can Cats and Dogs Feel Embarrassed?
Can you copyright recipes?
Queen Victoria's underwear up for auction
'Don't call me baby', a pigeon's rendition
How did humans... do yeast?