"Runaround" is a science fiction short story by American writer Isaac Asimov, featuring his recurring characters Powell and Donovan. It was written in October 1941 and first published in the March 1942 issue of Astounding Science Fiction. It appears in the collections I, Robot (1950), The Complete Robot (1982), and Robot Visions (1990). "Runaround" features the first explicit appearance of the Three Laws of Robotics, which had previously only been implied in Asimov's robot stories.
Artificial intelligence researcher Marvin Minsky said: "After 'Runaround' appeared in the March 1942 issue of Astounding [now Analog Science Fiction and Fact ], I never stopped thinking about how minds might work."
As in many of Asimov's Robot stories, conflicts in the application of the Three Laws of Robotics is the subject of the plot. In contrast to the majority of such stories, in which the lexical ambiguities of the Laws are employed to fashion a dilemma, the robot featured in "Runaround" is actually following the Laws as they were intended.
The plot revolves around the Three Laws of Robotics:
A robot may not injure a human being or, through inaction, allow a human being to come to harm.
A robot must obey the orders by human beings except where such orders would conflict with the First Law.
A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.
The robot finds it impossible to obey both the Second Law and the Third Law at the same time, and this freezes it in a loop of repetitive behavior.
In 2015, Powell, Donovan and Robot SPD-13, also known as "Speedy", are sent to Mercury to restart operations at a mining station which was abandoned ten years before.
They discover that the photo-cell banks that provide life support to the base are short on selenium and will soon fail. The nearest selenium pool is seventeen miles away, and since Speedy can withstand Mercury's high temperatures, Donovan sends him to get it. Powell and Donovan become worried when they realize that Speedy has not returned after five hours.