  seven days (also written as 7 days) is a science fiction television series based on the premise of time travel. it was produced by upn from 1998 to 2001. the television channel spike syndicated all of the episodes from 2003 to 2005. ==production== three seasons of seven days were produced. all three seasons have been shown in north america, while the bbc broadcast the first season in the united kingdom. there are currently no plans to release the entire series on dvd and/or blu-ray from paramount home entertainment and cbs home entertainment. ==synopsis== the plot follows a secret branch of the united states' national security agency which has developed a time travelling device based upon alien technology found at roswell. as the opening of the show says, the chronosphere, or backstep sphere, sends "one human being back in time seven days" to avert disasters. the show's name refers to the fact that the backstep project can only backstep seven days because of limitations imposed by the fuel source and its reactor. as the fuel source is limited, there is a strict mandate that they only backstep for events relating to "national security". the backstep team and the equipment are stationed in a base called never never land, which is in a secret location somewhere in the desert of nevada. ===project backstep=== project backstep was initiated by the national security agency (nsa) after the roswell incident of 1947. the crashed alien saucer was taken to a secret base called "never never land" (inspired by groom lake in area 51, nicknamed in real-life as "dreamland") in the nevada desert where it was reverse-engineered. by reverse-engineering the alien technology, they were able to create a time machine. the "time machine" consists of the chronosphere, including the chronosphere's hangar and its supporting equipment. the time machine uses element-115 salvaged from the roswell crash. this transuranic element allowed them to generate a time distortion field around the chronosphere. the sphere is teleported away 
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