The Six Million Dollar Man is an American science fiction and action television series, running from 1973 to 1978, about a former astronaut, USAF Colonel Steve Austin, portrayed by Lee Majors. After a NASA test flight accident, Austin is rebuilt with superhuman strength, speed, and vision due to bionic implants and is employed as a secret agent by a fictional U.S. government office titled OSI. The series was based on Martin Caidin's 1972 novel "Cyborg", which was the working title of the series during pre-production.