"Mr. Big" is the first episode of the first season of Get Smart and originally aired on September 18, 1965. In it, Maxwell Smart must rescue Professor Dante, whose device (the Enthermo) is being used by KAOS to menace the world. Max is told to rescue the professor, and bring back the Enthermo. Produced as the pilot episode of the series, this episode was filmed in black and white in early 1965. All other episodes that followed were in color.