Big Lizard
Big Lizard is a TV show on CBeeBies. The cosmic adventures of astronauts Cosima and Dad on Proxima B, where they meet larger-than-life Big Lizard! The program has been available since 2025. A total of 52 episodes have been broadcast, most recently in October 2025.
Last episode
Big Lizard
Rex is missing, but Dad, Cosima and Big Lizard need him to save them from a giant slug!
Catching up on Big Lizard?
Don't want to miss an episode anymore? Set up a free alarm and receive an email when new episodes are available. Handy!
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.
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.
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.
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!
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!
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!
Cosima and Big Lizard's solar-powered hoverboards run out of battery at nightfall. Can glowbugs be the answer?
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!
Twig steals Cosima's volleyball. A chase leads Big Lizard and Cosima to her den... and also to a happy discovery!
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.
During a hoverboard race, Dad's new super-powered hoverboard malfunctions, so Cosima and Big Lizard throw the race to rescue him!
When Big Lizard and Cosima get covered in nectar, they become unwilling house guests to some overfriendly beetles. Will Dunk come to their rescue?
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?
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?
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?
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.
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!
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!
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!