Two top nurseries clash in a battle of IQs in Nursery Challenge.
Polly launches a phone into space on a weather balloon.
Tee would love a garden that looks as amazing as Mr Og's, but gardens take time to grow.
Featuring Ninja Diddy Worriers, and live coverage of The World Bundle Championship.
Skye sets the commanders the task of shutting down the whole of AI Sciron's cyber army.
Tee is superexcited when new flat-pack shelving arrives for his room.
Featuring The Dimgineers, This is Pointless, and Craig Revell Horwood.
It's a cold day and Tee wants to play outside. Mo tells him to put on plenty of layers.
Natalie Dormer reads a story about a big dragon with a big problem: how to impress a king?
Ed and his mates explore nomadic areas of Mongolia's capital, Ulaanbaatar.
Sam and Mark reminisce over some of the incredible highlights of the current series.
Iain is joined by Saima Chowdhury, Rachel Stringer, Tom Craine and Ray Bradshaw.
Game show. Saara has discovered a place called Mumbles Pier.
It's bathtime, but Tee wants one more game with his favourite toy, Action Ape!
Saara connects Lola in Berkshire, Theo in Devon and Beth in County Durham.
Mo wants to take a new photo of Tee, but Tee isn't interested in posing for the camera.
Saara connects Lara in Buckinghamshire, Harley in Manchester and Aimee in Leeds.
Join JB to find out how families can come in lots of different shapes and sizes.
Bell agrees to take Maddie's son on a trip to the local museum - but loses him!
Tee's friend Lily the Tiger comes round to play her favourite game, Surprise!
Saara connects Addya from south London, Evan from Lancashire and Kirsty from Surrey.
Mo needs to go to the shops, but Tee would rather build a rocket out of cardboard boxes.
The commanders help find a way through the space station's biogarden tunnels.
Mo is excited to receive a new lamp, but Tee is more interested in the box it came in.
Saara connects Alisha in London, Eve in Manchester and some mystery celebrity contenders.
Rachel and the team learn how to mirror each other on the football pitch.
Join vloggers Laura, Myles, Rhys and Tee Cee for a very special episode.
Tonight's bedtime story, read by Celia Imie, is about the everlasting love of a parent.
When Tee gets involved in cake-making, he inevitably ends up with cake on his face.
Ed Petrie and his friends ride underwater scooters in Indonesia.
Iain is joined by Ivo Graham, Dr Ranj Singh, Lauren Layfield and Funmbi Omotayo.
Saara sets challenges from a virtual hub in Dull in Perthshire, Scotland.
Boy band New Hope Club surprise two of their biggest fans in the studio.
A tribute to Florence Nightingale, charting how she revolutionised medicine.
Saara sets challenges from a virtual hub in Ramsbottom, Greater Manchester.
Justin and his friends go on a steam train adventure, and Mr Tumble uses his imagination!