Amelia. The crew travels through a wormhole on board the Endurance to pass through to another galaxy. Their mission is to investigate three planets, orbiting a supermassive black hole called Gargantua, each of which was previously explored by a NASA scientist-explorer. The first planet is an aqua planet. The NASA explorer there is found dead, and one of their crew - Doyle - drowns after being caught in a massive tidal wave. The same tide also causes the probe's engines to be filled with water, forcing Cooper and Amelia to wait for them to dry out. They return to the Endurance in an hour, finding that 23 years have passed aboard due to the time dilation caused by the planet's proximity to Gargantua. In those 23 years, Murph has become a scientist, and begun working with Brand at NASA. She learns from a dying Professor Brand that he had given up on solving his gravity-equation, knowing that information is needed from inside a black hole. Instead, he put their mission's hopes on Cooper's team establishing a space colony using pre-fertilized eggs on a new habitable planet. At the second planet, the crew find its explorer, Mann, to be alive and awaken him from cryostasis. He eventually reveals to Cooper that he lied about the planet's habitability in the hope that NASA sent a mission to rescue him. Romilly dies in an explosion when he attempts to access the system's logs, while Mann tries to kill Cooper and hijack the Endurance spacecraft. Mann is killed when his craft fails to dock properly, and Cooper regains command of the Endurance. Cooper realizes that the Endurance only has enough resources for one person to safely complete their mission. He initiates a slingshot move around Gargantua, setting it to use gravity and be propelled to the final planet. At the last minute, he sacrifices himself by detaching from the spaceship and falling into the black hole, so that Amelia might safely complete the mission. Cooper survives and finds himself inside a five-dimensional tesseract, out of view from beyond the event horizon. From inside he can see moments in time from inside Murph's childhood bedroom. He finds her returning to look for clues to the gravity-equation, and he contacts her by manipulating items in the room with gravity to communicate through Morse code. Deducing that this construct has been created by future humans with the