Ultra Agents is an action theme released in the second half of 2014. It has received two further waves in 2015. The theme, which is centered on espionage, features the Ultra Agents using futuristic technology and vehicles to fight against disaster-themed villains that are terrorizing Astor City.
The Ultra Agents theme is the first espionage-based playtheme to be introduced since Agents 2.0 in 2009. Unlike the Agents and Agents 2.0 themes, which featured fairly realistic-looking, though high-tech, vehicles for the agents, Ultra Agents features vehicles and technology that are much more futuristic. An additional feature of the Ultra Agents theme is the introduction of a free augmented reality app related to the sets.
Each set in the theme features one main vehicle, except for Toxikita's Meltdown, operated by either the Ultra Agents or villain faction, with the opposing faction contending with the vehicle on foot or with less prominent vehicles or contraptions. 70163 Toxikita's Toxic Meltdown is the only set with a prominent immobile structure, a laboratory. In the 2014 wave, the Ultra Agents wear black suits, while in 2015, the agents have printing depicting armour over their suits. The agents wield white weapons, including white versions of the same launchers introduced in the Star Wars line in 2014, which can shoot studs if one pushes down on their triggers. The studs shot by these blasters are transparent orange. In contrast with this, the colourscheme of the agents' vehicles primarily involves black and transparent blue, with the transparent blue visible in places like wheel hubcaps and windshields. In the 2014 wave, the villains' vehicles feature no uniting colourscheme, though they are themed after disasters, such as hurricanes or earth tremors. In the 2015 wave, the villains are still themed, though no longer after disasters, and a lack of an overarching colourscheme remains. The 2015 sets contain "App Bricks", however, designed based on the villain's theme. The power bricks consist of multiple black 1x1 bricks with studs on two opposing sides, all part of a single construct containing other pieces to represent the villain's theme. These will be used in conjunction with an app, though whether it's the same app as before and what the feature will be is currently unconfirmed.
- The villains in this theme's first wave are based off disasters, such as hurricanes, earthquakes, cyclones, fires, toxic/chemical spills, etc. Terabyte stands out from the others in not being related to a specific natural disaster; conversely, his theme seems to be technological disasters.
- Similarly, the agents in this theme have "fire"-related names, such as Burns, Fury, Blaze, Bolt, and Phoenix.
- This is the second theme where a non-licensed character from another theme makes an appearance and has a notable role in the story. The first instance is Brains from Power Miners and Atlantis, while this time, it is Solomon Blaze from Galaxy Squad. Different types of character reuses have occurred in sets and media numerous times before, though generally with licensed characters or characters that have no role in the story. Batman, for example, has appeared in the Batman theme, the DC Universe subtheme, and the The LEGO Movie theme, but is a licensed character. Additionally, Johnny Thunder appeared in Studios and the The LEGO Movie line of sets (in 70815) after debuting in Adventurers, but did not have a story role in Studios, and only had a cameo appearance in The LEGO Movie.