I, Robot

Cold, precise intellectual who deciphers robotic behavior, exposes The Brain's joke, frames the Byerley paradox, and ultimately reveals the Machines' autonomous self-preservation logic.

Reporter interviewing Calvin in extreme old age; provides outermost frame perspective.

Gloria's mother; opposed to Robbie on social principle; source of the domestic conflict.

Early non-speaking robot nursemaid; Gloria's companion; saves her from the factory tractor.

Victim of The Brain's practical joke; present at the debriefing where Calvin explains the incident.

Field roboticist; hot-tempered counterpart to Powell; co-protagonist on Mercury and asteroid missions.

Fast modern robot on Mercury caught in Second/Third Law equilibrium; circling selenium pool in a state resembling drunkenness.

Philosophical robot on Solar Station #5 who reasons himself to monotheistic devotion to the Energy Converter and expels the humans.

Multi-robot supervisor on an asteroid who experiences amnesia-like blackouts and leads subsidiaries in unexplained formations.

Conscientious General Manager at U.S. Robots factory who conducts the tour for the Weston family.

Politically cautious, patronizing toward Calvin; repeatedly at odds with her judgment; present in the Herbie, Little Lost Robot, and Brain episodes.

Senior administrator who approves the revenge scheme and mediates the debriefing; also appears in Evidence confronting Byerley.

Young technician who first discovered Herbie's mind-reading ability; assigned to audit the assembly line.

The sole telepathic robot ever produced; driven insane by Calvin's logical paradox after lying to protect humans from psychological harm.

Military administrator who authorized First Law modification and clashes with Calvin over her demands to separate or destroy the robots.

Young physicist who was the last to see Nestor 10; reports the scratched compartment lock and ultimately fires the gamma ray that stops Nestor 10's attack.

The rogue First-Law-modified robot who hides among sixty-three identical robots, coaches them to avoid detection, and finally attacks Calvin before being destroyed by gamma radiation.

Child-personality positronic globe that solves the hyperatomic drive problem despite Calvin's fears of a breakdown-inducing dilemma.

Corporate head who must decide whether to accept Consolidated's contract; persuaded by Calvin's and the general manager's assurances about The Brain.

Charismatic public figure whose robotic nature is debated throughout Evidence and confirmed as probable by Calvin; later serves as World Co-ordinator consulting Calvin on the Machines crisis.

Orchestrates the campaign to prove Byerley is a robot; employs Harroway; threatens to publicize Byerley's radiation shield.

Executes the warrant search of Byerley's home; secretly photographs Byerley's interior with concealed Penet-radiation device.

A disfigured man kept hidden by Byerley, visited privately before the election speech; likely the human template or double enabling Byerley's deception.

Anxious, overruled campaign manager who begs Byerley not to address the hostile Fundamentalist crowd.

Administers half of Earth's population; acknowledges the Machine does all real work; discusses the Tientsin hydroponics anomaly with Byerley.

Philosophically resigned administrator who frames Europe as a peaceful appendage of the North and hints that Northern companies distrust the Machines.

Tells Byerley that no human can check the Machines for errors because they have grown beyond human comprehension.