In the fourth episode, Dromaeosaurs stalk a hadrosaur herd as they cross a freezing river. Male Ornithomimus raid rival nests to bolster their own. Olorotitan raise their offspring on fertile volcanic fields but contend with biting mosquitoes.
Troodontids hunt mammals flushed out by a forest fire. A juvenile Antarctopelta scours the forest for a new winter den. Within the snow-covered forest, a tense standoff develops between ancient rivals, Pachyrhinosaurus and Nanuqsaurus.

Water plants create some of the most beautiful, bizarre and important habitats on earth. To hold on in torrents, plants use a kind of superglue. Some are armed with vicious weapons to fight titanic battles for space. Others form perfect spheres and escape from animal enemies by rolling. Where nutrients are washed away, plants turn into hunters of animals, laying traps and even counting to ensure their success.
In this episode we explore those watery worlds with David Attenborough, from Croatia to Brazil, from Colombia to Thailand, the brilliantly coloured flowers smother lakes, and in one magical river in Brazil, the water bubbles like champagne as plants create the atmosphere itself.

Since the Silverstone GP, it's just gone up and up and up. For Max Verstappen, is kind of do or die. Only a few races remain, and for drivers desperate for any advantage they can get their hands on, the gloves are officially off.

(Click CC for subtitles) Rumors fly about whether an up-and-coming driver will join Hamilton on team Mercedes, potentially leaving Valtteri Bottas without a seat. Seemingly permanently stuck in the crisis of a one-year contract running out, this time Bottas has Mercedes golden boy George Russell breathing down his neck. The young Brit desperately wants Bottas’ seat, and things come to a head when the two collide at Imola. Scandalous.
Bottas can’t resist the inevitable though, and after Russell puts the F1 on the front row at Spa, whilst the Finn can only manage eighth, it looks to be all over. Thus follows a scene of Russell being told he has the Mercedes seat by Wolff in a scene which looks so staged it would make even cringe.

The Haas team looks to reverse its recent fortunes with a new sponsor and two rookie drivers: Nikita Mazepin and Mick Schumacher. Reliable Netflix gang-show entertainers, Guenther Steiner and his motley Haas crew are it again. This time they invited a Russian oligarch to sponsor them and his spoilt son to drive, what could possibly go wrong?
It soon turns out Nikita Mazepin can’t make head nor rear diffuser of the VF-21 car, being easily trounced by team-mate Mick Schumacher: 'I don’t know how he drives that thing' says poor Niki. Soon, some rather rude phrases are being exchanged between the team and driver, with the elder Mazepin threatening to withdraw his sponsorship early on in the season. However, what can only be described as a genius tyre call at his home grand prix in Sochi means young Maz rescues the situation and blazes a trail to finish.

This is the first of two episodes dissecting the psyche of Daniel Ricciardo. A second big money move in two years now sees the Australian set foot on the shore of the McLaren Technology Centre, only to find the territory is already occupied by Lando Norris. The Australian looks like he was really hoping to flash the car up into Q3 with his teeth, only to find it isn’t that easy.
Ricciardo is really struggling to get his head around the idiosyncratic MCL35M, but it gets worse: his boyish, funny, charismatic team-mate Norris is doing him over every week. The relations between the two drivers deteriorate also. Can Ricciardo recover his form?
The footage is interspersed with short scenes featuring Ferrari drivers Charles Leclerc and Carlos Sainz.