Nearly out of fuel, Cooper and Amelia plan to slingshot Endurance around Gargantua on a course toward Edmunds. TARS and Cooper detach into the black hole, hoping to collect data on the singularity and propel Amelia by dropping mass from the ship. They emerge in an extra-dimensional "tesseract" where time appears as a spatial dimension and portals lead to Murphy's childhood bedroom at various times. Cooper realizes the extra-dimensional beings are future humans who have created this space so he can communicate with Murphy as the "ghost" and save humanity. Using gravitational waves, he transmits TARS's data on the singularity to the adult Murphy through Morse code, allowing her to solve Brand's equation and evacuate Earth. Years later, Cooper awakes aboard a NASA space station and reunites with the now elderly Murphy, who has led humanity's exodus. Murphy convinces Cooper to search for Amelia, who is marooned on Edmunds' planet.