Duke DeTain, crisis-ready fire Chief Freya McCloud, grumpy street sweeper Shirley Keeper, eager handyman Harl Hubbs, dedicated city Mayor Solomon Fleck, Vice Mayor Carol Yea, business rivals R.E.

Fendrich and Mary Sinclair, Freya's troublesome nephew Billy McCloud, and skateboarding police Chief Percival "Wheelie" Wheeler.

[3][6] The series is a co-production between Axis Studios and French companies Passion Paris and Circus for The Lego Group.

[7] Lego City Adventures has received favourable comments from critics about its positive messages but has also been criticised for its consumerism.

Reviewer Emily Ashby for Common Sense Media gave the show a three-star rating, commenting that, "despite the fact that this series doubles as a pretty effective advertising campaign for the Lego brand/merchandise, it's a genuinely funny show with fast-paced, unpredictable humor".