Several of the stories feature the character of Dr. Susan Calvin, chief robopsychologist at U.S. Robots and Mechanical Men, Inc., the major manufacturer of robots. Upon their publication in this collection, Asimov wrote a framing sequence presenting the stories as Calvin's reminiscences during an interview with her about her life's work, chiefly concerned with aberrant behaviour of robots, and the use of "robopsychology" to sort them out.