The builders ransack a detective's office and leave with an item of their choice that they must replicate into a one-to-one scale model; "LEGO Masters" Season 3 winner, Stacey Roy, must play detective and spot which items are real.

The pairs are tasked with creating a roller coaster that incorporates a mechanical lift and a drop.

The remaining teams must build a car and a strong bridge; the creations are stress tested.

Contestants build droids and replicate iconic scenes inspired by the "Star Wars" franchise.

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Structural integrity and beauty come together in the most earth-shattering challenge, as teams build a structure strong enough to withstand an earthquake; which designs perform the best and pass the LEGO "brickter scale" rating system.

Teams include Sophia Bush, Holly Robinson Peete, Eric McCormack.

Celebrity builders Sophia Bush, Holly Robinson Peete, Eric McCormack and Lil Rel Howery.

The talented teams are introduced and tasked with building an eye-catching float in the first-ever LEGO Day Parade.

The teams must build a gravity-defying castle off a giant LEGO cliff.

Teams put a stunt "minifigure" to the test in an explosive stunt action scene. The duos must craft an immersive build filled with slime, water, glitter and colored dust to create the ultimate action movie moment.

This week's challenge is the ultimate test in ingenuity and engineering, as teams will create incredible and wearable hats made entirely of LEGO bricks. Then, teams must model their designs on the LEGO runway, hoping their creations don't collapse into pieces.

As the competition heightens, the remaining contestants are expected to raise the stakes and elevate their work - quite literally - when the teams are tasked with building a beautiful structure in mid-air. Building tables will be removed from the LEGO workspace and duos will be challenged to create a build of their choosing from the foundation of one floating LEGO technic brick. Discover who will take LEGO to new heights.

Teams use bricks to create an off-road remote-controlled vehicle for an ultimate race.

Each team must transform a putting green into a playable mini golf hole.

The contests each build a city block that is brought together as a huge city at the end.

The builders must skillfully construct a scene inspired by their chosen biome while including an explosion and a compelling narrative.

Man's best friend in bricks! Each team races to pick which furry friend they'll recreate.

The teams compete in two super-sized brick-building challenges; the winning team wins $20,000 for the charity of its choice.

The builders must make pet palaces for kittens.

Returning fan-favorites contestants David Guedes, Caleb Schilling, Krystle Starr and Randal Wilson, and celebrities NeNe Leaks, Marshawn Lynch, Kelly Osbourne and Rob Riggle pair together to compete in holiday-themed challenges.

The pairs of contestants are introduced; each duo must craft one section of a theme park.

Each team builds the other half of an everyday object that has been sliced in two.

Phil Lord and Christopher Miller task the contestants with a movie-themed challenge.

Contestants create evil lairs and fly vehicles through their Lego worlds; actor Terry Crews.