Four new teams arrive to undertake the most ambitious Block project ever - transforming a charming 1930s Georgian firehouse into multimillion-dollar apartments.

Mark calls the teams for a fiery challenge which has everyone gasping for air. Problems arise for Ethan and Sam as pipe protrusions potentially impact their reno.

Lisa plays mind games with other teams and on the final tradie day, a screw-up by the boys has the potential to derail all the teams.

It's time for the first and most important room reveal on The Block NZ. The winning team gets their pick of any apartment so everything is at stake! Who will impress our new judge?

It's Kid's Bedroom Week but Sophia and Mikaere are busy thinking about a completely different section of their apartment. Plus, the safe is opened - what is its secret advantage?

As the kid's bedroom renos continue, rumours fly about what Sophia and Mikaere could be planning. Amidst accusations of cheating, the first Block Collective meeting is called.

The first fiery Block Collective meeting takes place for 2019. Stress levels are high, alliances are formed and friendships are broken.

The teams rush to finish their kid's bedrooms, but one team faces serious wallpaper woes 24 hours before tools down. Later, the judges have their say...

Get ready for a bombshell, for the first time in Block NZ history, a fifth team enters The Block and shakes up the competition.

Bathroom Week starts to get wet and wild and the first Firehouse Block Collective threatens to crush Sophia and Mikaere's dreams.

The Firehouse feud reaches new heights as the pressure of Bathroom Week hits the teams hard. A miscommunication sees one team's tiling troubles intensify.

It's judgment day, but bathroom woes see three teams struggling to keep their heads above water. With $7000 on the line, will the fifth team end up taking it out?

Will cheating allegations lead to a disqualification? Plus, teams begin on their most complicated space yet, Master Bedroom and En Suite Week, and rivalry breaks out again.

Competition is at an all-time high with $10,000 up for grabs for this week's winner. Tensions are soaring for Sophia and Mikaere as their mega master bedroom falls further behind.

Block life sets the teams against each other, and while all of the teams are on a road to redemption, it's going to be a bumpy ride to the finish line.

The most controversial room reveal is threatened by cheating scandals and a big steal, leaving one team's master bedroom and en suite in deep trouble.

The teams face their toughest challenge yet. Can they put aside their differences to work together in Apartment 5? Then, team judging gets tactical just in time for Dinner Wars!

Dinner Wars amps up as teams debate scoring strategically. Could Sophia and Mikaere's rival Mexican dinner drive a bigger wedge between them and Stacy and Adam?

A challenging week has the teams struggling to work together in shared spaces to complete Apartment 5. Plus, Ethan and Sam host the final dinner party.

Room reveal is fast approaching as teams go head to head to complete shared spaces in Apartment 5. Who will take out the massive $10,000 prize in the closest scoring yet?

The conclusion of the most contentious room reveal yet leaves one team feeling defeated and has scoring strategically in Dinner Wars backfired?

The teams and their builders tackle the heart of the home in kitchen and dining week. Later, the gloves are off as the judges and our teams finally come face to face!

It's go big or get low scores, as the judges demand bolder design choices! Then one team, still fixated on last week's results, decide to challenge the rules.

A secret advantage turns into strategic play and the teams vie to impress the judges with bold design choices at the first room reveal following the judges intervention.

Everyone has big plans for their living and media room spaces, later, a challenge leaves Lisa fuming!