There, they meet Professor Brand (Michael Caine). He reveals that a wormhole appeared near Saturn 48 years prior, placed there by an unknown intelligence (referred to as "They"). The wormhole leads to another galaxy with potentially habitable worlds. Brand convinces Cooper to pilot the Endurance spacecraft to evaluate three potential planets identified by previous explorers in the "Lazarus Missions." Cooper agrees, leaving a heartbroken Murph behind, promising to return.