The third season of the American television comedy The Office premiered in the United States on NBC on September 21, 2006, and concluded on May 17, 2007. The season had a total of 25 half-hours of material, divided into 17 half-hour episodes, four 40-minute "super-sized" episodes, and two one-hour episodes. The Office is an American adaptation of the British TV series of the same name as a mockumentary portraying the daily lives of office employees in the Scranton, Pennsylvania branch of the fictitious Dunder Mifflin Paper Company.