The first season of ReBoot was highly episodic, with each installment being a self-contained episode. Most of the episodes established characters, locations, and story elements, such as the gigantic game cubes. When The User loads a game, a game cube drops on a random location in Mainframe, sealing it off from the rest of the system and turning it into a gamescape. Bob frequently enters the games, reboots to become a game character, and fights the User's character to save the sector. If the User wins a game, the sector the cube fell in is destroyed, and the sprites and binomes who were caught within are turned into energy-draining, worm-like parasites called nulls. Within the series it is never clear if there is a "cure" or reversal for degrading to a null.
