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?
Source: CBeebies
Series 1: 15. The Triple Eclipse
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 ...
18-05-2025
CBeebies
Series 1: 41. When Dad Got The Hiccups
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!
18-05-2025
CBeebies
Series 1: 18. Dad's Birthday
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?
18-05-2025
CBeebies
Series 1: 14. How To Record Sound
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 cos ...
17-05-2025
CBeebies
Series 1: 40. Big Lizard's Big Itch
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!
17-05-2025
CBeebies
Series 1: 17. The Cocoon
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!
17-05-2025
CBeebies
Series 1: 29. The Shiny Fruit
Cosima and Big Lizard find some fascinatingly slippery fruit, but bringing it safely back to the ship is more challenging than they imagined!
16-05-2025
CBeebies
Series 1: 38. All About Coral
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 c ...
16-05-2025
CBeebies
Series 1: 28. The Night Of The Slug
Big Lizard and Cosima undertake an exciting night-time mission rehoming a friendly slug that's taken residence in Cosima's bedroom!
15-05-2025
CBeebies
Series 1: 37. Cosmic Groove
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.
15-05-2025
CBeebies
Series 1: 12. All About Home
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.
10-05-2025
CBeebies
Series 1: 48. How To Speak Lizard
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.
02-04-2025
CBeebies
Series 1: 19. Best Friends Forever
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 h ...
05-05-2025
CBeebies
Series 1: 32. All Out Of Marmalade
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!
08-05-2025
CBeebies
Series 1: 13. When Dad Sleepwalked
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.
11-05-2025
CBeebies
Series 1: 4. The Day We Met Ammon
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!
14-04-2025
CBeebies
Series 1: 18. Dad's Birthday
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?
18-05-2025
CBeebies
Series 1: 9. How To Work Together
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!
27-04-2025
CBeebies
Series 1: 39. The Vegetable Robbery!
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!
11-05-2025
CBeebies
Series 1: 10. When We Lost D.o.r.i.s.'s Brain
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.' ...
03-05-2025
CBeebies