Episode 1
The Day We Landed
7m
Whilst exploring deep space, a meteor strikes Cosima and Dad's ship! After crash-landing on the unexplored planet of Proxima, Cosima makes a new best friend called Big Lizard.
Where to watch Big Lizard
TV series
Big Lizard
20241 season
The cosmic adventures of astronauts Cosima and Dad on Proxima B, where they meet larger-than-life Big Lizard!
Availability
Not streaming in United States
Checked Jul 22, 2026
Big Lizard premiered October 28, 2024. We don't have a confirmed streaming, rental or purchase option yet.
Synopsis
The cosmic adventures of astronauts Cosima and Dad on Proxima B, where they meet larger-than-life Big Lizard!
Season 1 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
The Trouble with Trilobites
7m
When a pack of pesky, migrating trilobites overrun the ship, Big Lizard has to use a hidden talent to lure them away. But one little trilobite, Rex, decides to stay.
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Episode 3
How We Met Dunk
7m
Searching for a vital part of the ship that was lost during their crash-landing, Cosima and Big Lizard find Dunk stuck on a beach. They use science to save the day and make a new friend.
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Episode 4
The Day We Met Ammon
7m
Dad drops an essential gizmo in a hard-to-reach place. Big Lizard takes them on an underwater adventure to meet Ammon, the tentacled solution to their problem!
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Episode 5
Dad's Discovery
7m
Whilst searching for new discoveries, a rockfall traps Dad, Cosima and Big Lizard in a cave. Just when all is lost, Dad finally discovers a new species!
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Episode 6
The Missing Volleyball
7m
Twig steals Cosima's volleyball. A chase leads Big Lizard and Cosima to her den... and also to a happy discovery!
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Episode 7
How to Hoverboard
7m
Cosima and Big Lizard's solar-powered hoverboards run out of battery at nightfall. Can glowbugs be the answer?
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Episode 8
Hot and Cold
7m
Volcanic smoke blocks the three Proximan suns, which causes Big Lizard to become worryingly cold. Cosima's on the case and comes up with a superhot solution!
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Episode 9
How to Work Together
7m
Cosima, Big Lizard and Ammon are squabbling over Dad's precious explorer notebook when disaster strikes. Only by working together can they save it from being lost forever!
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Episode 10
When We Lost D.O.R.I.S.'s Brain
7m
When a giant beetle steals D.O.R.I.S.'s brain, thinking it's a nut, Cosima and Big Lizard give chase through the forest. Big Lizard uses unique skills to rescue poor D.O.R.I.S.'s superbrain.
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Episode 11
Happy Campers
7m
Cosima and Big Lizard have a camping sleepover with a friendly little crab. In the morning, their new friend is missing, but why?
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Episode 12
All About Home
7m
Cosima is so excited to tell Big Lizard about her life on earth that she doesn't realise he has something exciting to say to her.
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Episode 13
When Dad Sleepwalked
7m
Cosima and Big Lizard investigate the cause of Dad's mysterious sleepwalking in an adventure that takes them around Proxima and right back home again.
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Episode 14
How to Record Sound
7m
Big Lizard accidentally deletes some of Dad's 'boring' Proximan audio recordings. Through a dramatic sound adventure, Cosima realises the recordings are not boring - they're cosmic!
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Episode 15
The Triple Eclipse
7m
A triple solar eclipse is about to happen! Cosima and Big Lizard race down the volcano and hitch a lift on a dragonfly so that they can get vital equipment to Dad in the nick of time.
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Episode 16
Crystals!
7m
Big Lizard has found an epic crystal, and Cosima is jealous. Their squabbling reaches its peak at the top of the volcano! Will they learn to share before it's too late?
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Episode 17
The Cocoon
7m
A dragonfly steals a bee cocoon that Cosima had vowed to keep safe. Cosima and Big Lizard give chase, leading to a surprising solution with a vacuum cleaner and some sticky vines!
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Episode 18
Dad's Birthday
7m
When Cosima wrongly accuses Big Lizard of eating Dad's birthday cake, he vanishes. Has he run away, or is he planning a special surprise to save the day?
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Episode 19
Best Friends Forever
7m
Big Lizard is jealous of the vacuum cleaner and hides it from Dad and Cosima. Ammon decides it's her new best friend, whilst Cosima reassures Big Lizard that he will always be her BFF.
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Episode 20
Magnetite
7m
A strange find far away from the ship breaks D.O.R.I.S.’s satnav. Luckily, Big Lizard’s on hand to teach Cosima how to find her way around without technology.
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Episode 21
The Problem Plant
7m
Big Lizard frustrates Dad by stealing a strange plant from the ship. A disaster is averted when Big Lizard persuades Dad that there's more to this plant than meets the eye - and nose...
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Episode 22
The Sea Meteorite!
7m
When a meteorite splashes into the sea, Dad and Cosima cause problems by claiming it in the name of science, against the wishes of the sea creatures.
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Episode 23
Astronaut Health Check
7m
Dad needs some training to pass his astronaut fitness test. Cosima and Big Lizard put him through his paces! When Rex gets into trouble, Dad’s hard work finally pays off.
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Episode 24
How to Fix a Tyre
7m
When the buggy gets a flat tyre, Dad, Cosima and Big Lizard are stranded. Big Lizard’s playful nature helps reveal a creative solution to their problem.
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Episode 25
Cosima in Charge
7m
Dad has left Cosima in charge for the day. It seems like an excellent opportunity to have a massive party! What could possibly go wrong?
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Episode 26
Happy Proximas!
7m
When it unexpectedly snows, Cosima decides it must be Christmas! Rex disrupts her festive preparations, but it doesn't stop the family having a perfect 'Proximas'.
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Episode 27
The Day Ammon Overcame Her Fear
7m
Ammon gets spooked by a tiny insect, but overcomes her fear to rescue Cosima and Big Lizard from the rapids.
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Episode 28
The Night of the Slug
7m
Big Lizard and Cosima undertake an exciting night-time mission rehoming a friendly slug that's taken residence in Cosima's bedroom!
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Episode 29
The Shiny Fruit
7m
Cosima and Big Lizard find some fascinatingly slippery fruit, but bringing it safely back to the ship is more challenging than they imagined!
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Episode 30
Dad's Drone
7m
Big Lizard wants to have a go with Dad's new drone, but first he has to prove that he can go a whole day without breaking something precious. Good luck, Big Lizard!
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Episode 31
A Medical Emergency
7m
Whilst playing doctors, Cosima discovers an animal with no heartbeat! Can Cosima and Big Lizard save the poor creature with Dad's medical kit?
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Episode 32
All Out of Marmalade
7m
When Dad runs out of marmalade, Big Lizard shows Cosima a plant that's growing Proximan oranges. The leaves turn out to be giant bugs, who aren't happy about sharing their fruit!
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Episode 33
After the Storm
7m
After a storm passes overhead, many creatures turn up in surprising places and need Cosima and Big Lizard's help. But try as they might, the friends can't find poor Rex.
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Episode 34
The River Picnic
7m
Cosima and Big Lizard go paddleboarding, but Dunk and the river creatures are behaving strangely. Could it be something to do with Dad's desire for a cup of tea?
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Episode 35
The Overfriendly Neighbours
7m
When Big Lizard and Cosima get covered in nectar, they become unwilling house guests to some overfriendly beetles. Will Dunk come to their rescue?
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Episode 36
The Lesson
7m
Whilst Dad is stuck in the desert, D.O.R.I.S. tries to give Cosima and Big Lizard a lesson on friction. As things begin to heat up, a creature steals Cosima's only means to locate Dad!
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Episode 37
Cosmic Groove
7m
Dad's favourite record won't play anymore, so Cosima and Big Lizard secretly plan to learn the song and surprise him. However, they have trouble recruiting a drummer.
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Episode 38
All About Coral
7m
Big Lizard and Cosima create a fantastic water ride when they dislodge an underwater rock blocking a volcanic vent. It's all good fun until they realise the sea is starting to change.
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Episode 39
The Vegetable Robbery!
7m
When all the vegetables from their garden are stolen, detectives Cosima and Big Lizard investigate all over the neighbourhood - only to return to the scene of the crime!
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Episode 40
Big Lizard's Big Itch
7m
Big Lizard isn't happy in his skin! Cosima tries everything to stop him scratching until she realises that's exactly what he needs to do. He's shedding his skin!
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Episode 41
When Dad Got the Hiccups
7m
Dad gets a severe case of Proximan hiccups. Big Lizard and Cosima do their best to help, but their attempt to scare Dad goes wrong when a real 'monster' turns up!
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Episode 42
Personal Space
7m
When Cosima finally finds a quiet place to read her book, she realises peace and quiet aren't all they're made out to be. Where's Big Lizard when she needs him?
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Episode 43
A Place to Sleep
7m
Whilst Dad searches for a faulty wire, Cosima and Big Lizard play tag in the ship and accidentally break Big Lizard's bath bed! Where will he sleep now? And where's that pesky wire?
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Episode 44
The Hoverboard Race
7m
During a hoverboard race, Dad's new super-powered hoverboard malfunctions, so Cosima and Big Lizard throw the race to rescue him!
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Episode 45
Prank Day!
7m
Dad and Cosima both think they're the best at pranking. Their prank war quickly spirals out of control, until Big Lizard finally reveals Proxima's real pranking champion!
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Episode 46
The Camera
7m
Cosima takes over Dad's mission to film a unique underwater plant. But his special camera proves harder to operate than she'd thought, and Big Lizard keeps getting distracted.
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Episode 47
The Day We Lost Rex
7m
Rex is missing, but Dad, Cosima and Big Lizard need him to save them from a giant slug!
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Episode 48
How to Speak Lizard
7m
When Dad's Lizard Translator malfunctions, Cosima is carried away by a giant beetle! Cosima and Big Lizard realise they don't need to speak the same language to be best friends.
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Episode 49
A Big Day Out for D.O.R.I.S.
7m
Dad gets trapped in the shower when D.O.R.I.S. decides to visit the sea. Can Big Lizard and Cosima stop her before she does herself permanent damage?
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Episode 50
The Earth Probe
7m
Finding an earth probe makes Dad homesick. When Big Lizard accidentally destroys it, Cosima knows what to do. She recreates the contents - Proxima-style!
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Episode 51
One Whole Year
7m
It's been one year since Cosima crash landed on Proxima, but no-one else has remembered this anniversary! Can a perfect picnic jolt their memories?
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Episode 52
The Day We Left
7mfinale
When D.O.R.I.S. reveals a large meteor is about to land on the spaceship, it's finally time to leave. But should Big Lizard leave too? What about all those who need him on Proxima?
Where to watch Big LizardEpisode information updated Jul 25, 2026
Available now in United States
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More about Big Lizard
Cast
Josh WiddicombeDad (voice)
Mandip GillD.O.R.I.S (voice)Lois SeftonCosima (voice)
Dan ChambersBig Lizard
Credits
- Created by
- Amaël Isnard
Production details
- Status
- Ended
- Series type
- Scripted
- Episodes
- 52
- Original language
- English
Networks & production
CBeebiesUnited Kingdom
OkooFrance- Beakus
Watch Next MediaFrance
Je suis bien contentFrance
Themes
dinosaureducationalprehistoryscience