Seven Days (also written as 7 Days) is an American science fiction television series based on the premise of time travel. It was created by Christopher and Zachary Crowe, and aired on UPN from October 7, 1998 to May 29, 2001.
The plot follows a secret branch of the US National Security Agency, which has developed a time travelling device based upon alien technology found at Roswell. As the opening of the show recounts, the Chronosphere, or Backstep Sphere, is capable of sending “one human being back in time seven days” to avert disasters. The show's title refers to the chief limitation of the technology, namely that a traveler can only backstep seven days due to limitations imposed by the device's fuel source and its reactor. As the fuel source is limited, there is a strict mandate that the backstep is confined to events relating directly to national security. The backstep team and the equipment are stationed in a base in a secret location somewhere in the desert of Nevada called Never Never Land—a play on Area 51, or Groom Lake Flight Test Facilities, also known as Dreamland.