Residents of the sprawling and diverse LEGO City community engage in absurd and action-packed adventures.
Billy and Maddy find a clue to the City founder's identity and they save Maddy's mum when the security system goes crazy. (S4, ep 1)
With help from the kids, Daisy 'Kaboom' Lewis creates an alter ego to take the blame for her past misdeeds. (S4, ep 2)
Billy must save his astronaut hero when Captain Momentous hallucinates an alien invasion after eating expired astronaut food! (S4, ep 3)
Billy and Maddy help Stunt Driver Wallop pass a safe driving course so he can keep on the city streets. (S4, ep 4)
Cultures clash when the fire department moves in temporarily with the police department following damage to their station. (S4, ep 5)
The Ice Cream Truck Bandits sabotage the police force with frozen drinks, giving the officers a Glacial Brain Freeze! (S4, ep 6)
Maddy's filmmaking ambitions go wild when she offers to direct a simple fire safety video! (S4, ep 7)
A depressed Dr Wexler quits science, but when a meteor threatens the City, Billy and Maddy must restore his confidence. (S4, ep 8)
Billy worries he won't meet his mum's expectations when she signs them up for a charity event's team physical challenges. (S4, ep 9)
The Good, the Bad... And the Turtles: Maddy takes in two lost turtles, unaware they belong to rivals Sinclair and Fendrich. (S4, ep 10)
With their best friends out of town, Maddy and Dread spend the day together and struggle to find anything in common. (S4, ep 11)
Mr Produce Buys the Farm: After buying a farm to grow his own produce, Mr Produce becomes convinced neighbouring farmers are out to get him! (S4, ep 12)
Fendrich and Sinclair forge an unlikely alliance to drive Harl off a piece of undeveloped land he owns. (S4, ep 13)
To save her job, Shirley Keeper infiltrates the City's underworld to retrieve the secret formula for Vita Rush's new flavour. (S4, ep 14)
To build an environmentally unfriendly factory, Fendrich preys on Mayor Fleck's need to be liked so he'll approve the project. (S4, ep 15)
Grizzled's first partner and old friend, a cop with bad habits, returns to the City on a case and soon Grizzled has fallen back into old routines. (S4, ep 16)
When they notice Freya is in a rut when it comes to making firefighting decisions, the kids help her get her groove back! (S4, ep 17)
When they learn Fendrich owns the City, the kids need Chief Wheeler's help... but he seems to have turned into a sheep! (S4, ep 18)
Billy, Maddy and friends resist Fendrich's iron rule and desperately try to prove that he does not actually own the City. (S4, ep 19)
Moments before Fendrich can tear down City Hall, Billy and Maddy learn the shocking truth of who owns the City. (S4, ep 20)