civilian role from M:Tron. Based on exploration on an ice planet, sets were designed with skis (both on vehicles and personnel), a blue and white color scheme with transparent neon orange canopies, and transparent neon orange chainsaws. As befitting an icebound theme, most of its vehicles were ground-based, and many of its smaller vehicles also carried satellite dishes, seemingly to track or communicate with the rockets launched by the larger vehicles or its base. This was also the first Space theme to have a named character (Commander Cold) and a female minifigure. Spyrius (1994–1995) In 1994, Spyrius replaced Blacktron as the "bad" faction, with sets designed around spying and infiltration. The set designs were mostly red and black with transparent blue canopies. Most spaceships in this theme were shaped like flying saucers and the ground vehicles were designed like giant robots. The faction was often marketed as stealing technology from Unitron. This nine-set theme was the first to feature robot minifigures. Unitron (1994–1995) Also in 1994, Unitron took over the "good guy" role from the Space Police II. The Unitron theme revolved around a large monorail system powered by a 9V battery. The four sets were designed in blue and grey with transparent blue canopies and transparent neon green highlights. It also retained Lego interchangeability in the form of small cockpits which could dock on the front or top of its vehicles. Unfortunately, the theme was underdeveloped aside from a ground installation, a large buggy, an advanced-looking spaceship, and the monorail. Except for the Monorail set, the theme was only released in the United States and Canada. Exploriens (1996) In 1996, Lego returned to the white and transparent blue canopies of Futuron with the Exploriens Theme. Sets are known for using large, open (sometimes rickety) structures and special image elements (e.g., as foil-holograph stickers for viewscreens). The Exploriens were searching, evidently, for fossils, and certain flat plates contained triple images: one in white, for the naked eye; one in blue, for viewing under transparent red scanners; and one in red, for viewing under transparent blue scanners. It was the second space theme to include a robot minifigure; some also considered this the second Space theme to include a female minifigure, but this minifigure was a feminine robot named Ann Droid. The android head was taken over from Spyrius. The theme shares many similarities with the popular Star Trek TV Series,