Season One

Season one began in the United States and Canada on September 23, 2006 and featured 23 episodes. Season one consisted of the first volume, known as "Genesis."^[26] The series went on hiatus twice; first from December 4, 2006 to January 22, 2007,^[27] and again from March 5 to April 23, 2007,^[28] with the season finale airing on May 21, 2007.^[29]

The series begins as a seemingly ordinary group of people gradually become aware that they have special abilities. Events illustrate their reactions to these powers, and how the discovery affects their personal and professional lives. At the same time, several ordinary individuals are investigating the origins and extent of these abilities. Mohinder Suresh, a geneticist, continues his late father's research into the biological source of the change, while Noah Bennet represents a secret organization known only as the "Company".

While coping, each of the characters is drawn — willingly or not — into the Company's conspiracy to control superpowered people, and into a race to stop an explosion from destroying New York City, which would kill millions of its inhabitants. Throughout the season, the predatory stalkings of the serial killer Sylar and continued manipulations from casino-owner and mobster Mr. Linderman affect the characters directly and indirectly. Several characters' individual stories culminated in a climactic meeting of the characters at Kirby Plaza in New York. These stories included Peter Petrelli's abilities, Nathan's campaign for Congress, Claire Bennet's search for her biological parents, Hiro Nakamura's adventurous journeys, Niki Sanders' multiple personalities, and Isaac Mendez's precognitive visions.

Source : - Wikipedia