Martha and Godfrey think that there is a cow and a horse in Brenda's pond. Uno, Duo and Trio try to trick them, but Brenda eventually tells them that those are really just reflections just "under the water".
The animals try to stop Uno, Duo and Trio eating the moon. Along with Ginger's help, they all discover something important about the changing night sky. Then, they have a midnight picnic under the stars.
The animals discover why things always fall downwards, but they don't know the rats are only trying to play a trick on them. Ginger tickles Duo as Trio crashes on Uno. The animals all think what else floats upwards that night.
One warm day, the farm animals all decide to have a sunflower-growing contest, presented by Ginger the Cat, but Martha the Cow finds out that clean water, damp soil and sunshine are needed to make the sunflowers grow and wins the contest.
Brenda has three mystery guests who eventually hatch out of her eggs, but why do they look so much like her? She shows them the way she swims on her pond, and then, they have a picnic; with Trio the baby rat as Brenda's surprise!
The mysterious disappearance of some food including Dudley's turnips introduces the three rats, (Uno, Duo and Trio) to the farm - but which animal on the farm eats what, and why? Well, it's the rat pack, of course! Although this is the sixth episode overall, it is also the first episode to introduce the animals, and the new arrival of the Rat Pack.
On a cold day on the farm, Brenda's pond freezes over. The animals discover the relationship between ice and water. Godfrey wants to slide on the ice, but he does it so hard that he cracks the ice, revealing water again. When he sinks, it's up to Martha, Brenda and the rat pack to rescue him from drowning as a serious proclamation that icy places are just dangerous to play on. They'd prefer only Brenda and Davenport to skate on it instead tomorrow.
After such a tremendous thunderstorm on the farm, Dudley's sty is in need of urgent repairs, but what can be done to mend the sty itself? Only the correct material will "do the trick". A plastic sheet and a rubber car tyre are just perfect for a roof window for Dudley's sty, as they both keep out the rain, and let in the sunlight.
After going round and round in circles, like a merry-go-round, Davenport the Dog tries an experiment with a bucket with the rat pack, but who is either up or down? Well, when Davenport is stuck halfway up to the building's window, Trio manages to climb onto him, and, (along with the 3 rats,) everyone falls, landing on Godfrey's head 3 times, causing poor Godfrey himself to see stars spinning around in front of his eyes.
It is night time on the farm. The animals learn that there are many ways of making sounds, but not all are musical. As the big night eventually arrives, Uno, the Leader of the Rat Pack, introduces the animals responsibly playing their roles - Godfrey the Horse stamping his feet on the boxes, Dudley the Pig with his creaky bottom on the fence, Ginger the Cat pushing the barn door with her foot, Brenda the Duck shaking her seed-crumb packet, Martha the Cow playing the flowerpot bells and Trio blowing notes from the water bottles. It is a great success, as the applause is heard.
While the rats try to substitute the farm animals' food for painted stones, Dudley and Godfrey both discover that certain objects float and sink in water.
The three rats trick the animals into giving their food to be looked after by using some "superior intelligence". However, the rats neglect some of the food and fully preserve their portion. Duo manages to get the (cut) plastic box providing the animals to find their food perfect to eat, as the rats won't again take more than their fair shares.
During a test to see which animal can jump the highest, Godfrey accidentally smashes Ginger's box by jumping onto it and smashing it against the farm's water trough. Whilst building a new box, the animals get the scale and measurements all wrong. Luckily, Davenport has the correct box. Ginger is pleased that everything is sorted out, even Dudley, who manages to find the little box for turnips to act as a personal snack-keeper.
The three mischievous rats find a magnet, and attempt to trick the animals into thinking its attraction. They do an attractiveness test. Duo however, with such a big sneeze, accidentally gives the game away. Uno manages to find Godfrey's lucky charm, and all is well.
Duo unwittingly makes a rain gauge out of a round glass jar, thinking that it's an "all-over all-round umbrella". When it is dry and sunny on Godfrey's birthday, Godfrey is unhappy about the lack of rain, so the rats help him out, as if to make him think that there has been a very wet and short rainstorm in farm history.
During a chasing game, Davenport and the three rats discover a dead bird lying helplessly near the farm's water well, and decide to bury it in the ground before wishing it all the best for its afterlife in Heaven. They then notice three chicks in the tree. Duo gives the chicks some worms, and then, the animals all give the young birds a chance to fly.
When huge footprints appear in the snow one Winter's day, the farm animals think that there must be a giant on the loose, but they soon learn why all animals are entirely different.
Everybody on the farm enjoys the snow, but when Dudley falls into the snow, freezes and cannot move unaided, it takes the other animals and a lot of applied science to help him get up by rolling him onto Godfrey's cart and then giving him a ride back to the farm before placing him in front of the stove in the barn to warm him up. After the good news, they tell Martha, the question is: are there any other ways of making things move more easily?
It is a cold Winter's day on the farm, and after having Duo putting too much wood in the barn's stove, the animals are out of fuel. What can the animals do to produce heat and conserve it? The following morning though, Ginger tells the other animals that the Sun has melted all the snow away, and that the barn door is no longer stuck.
When the sky turns red one evening on the farm, the animals are intrigued at their own shadows and decide to use this new discovery to put on their very own play. They put on a play about two of the animals (a horse and a duck) making a wish or two. It is a great success.
The three rats attempt to decorate Davenport's dog kennel, but they keep mixing up their paint pots, and the plan itself goes horribly wrong, that is, until the heavy rain washes all the paint away, leaving the kennel itself exactly how it was at the beginning of the plan.
Davenport becomes ill one day, and he worries about if he'll ever get well again. Unfortunately, the animals don't have a solution to help him get well in time for a planned picnic (even as Uno uses a water bottle to act as elixir), except Ginger the Cat who provides proper medicine. Davenport is feeling better the next day in time for the picnic, and all is well. The question the following night is: "where do illnesses come from".
Duo accidentally falls into a bag of flour in the barn and turns white, like a ghost. The rats use the flour to make some pizzas and ask what topping it will have, along with a milkshake and their fast food and drink delivery service becomes a great success. All in all, the day really does turn out to be "a day to remember".
The animals run out of wood for the stove, but, along with Martha's help, they learn all about the four seasons. Trees lose their leaves in Autumn, they sleep all through Winter and then, they all wake up and get lively in Spring before Summer.
It is a cool, breezy day on the farm and the three rats are trying to find a way to take advantage of the strong wind, but Duo is accidentally flown on Davenport's kite and stranded on the rooftop next to Voltaire the weather cock on top of the archway. Trio climbs up the kite string to the rooftop to rescue him before giving him the descent of his life. The nightly discussion from the animals is, what if some places didn't have any air?