Description: A scientific expedition in the Atlantic Ocean becomes lost in the Bermuda Triangle and washes up on an uncharted island. They meet up with travelers from other times, planets and dimensions who have also become trapped, and together they "slide" through portals from one dimension to the next hoping to find the one that leads home. WIKIPEDIA has details... American science fiction television series that was originally aired on NBC from February 3 through June 17, 1977.