"One of my favourite movies but Interstellar. There's the one planet where the surface is water with huge waves and time moves much slower, so like 5 minutes on that planet is 2 years on earth (or something like that). Before going down, the scientists discuss how risky this is, as even if they go down to get the earlier astronaut and check the planet out for habitability, years will pass on earth while they're down there, and earth is running out of time. They are experts in this and they fully understand the time distortion on this planet caused by the black hole it orbits. HOWEVER, they decide to go anyways because the astronaut that went there to check it out has been sending positive signals about he environment and habitability of the planet for something like 12 years. So OMG we have to go if it's so good that she's been there that long and everything is good. Their only concern is about the amount of time that will pass on earth... After they land, they have this massive realization that it's just a bunch of shallow water with massive tidal waves every hour or so, and the astronaut they sent there 12 years ago actually just landed like 30 mins ago in her time because of the time distortion, and is dead. Then they are like "oh doh we've been getting positive signals for 12 years because for her it's only been 30 mins and she hadn't been hit by a wave and killed yet - this planet is bad". The entire rest of the plot is completely dependent on the fact that they get f**ked by this stop as the ship now has low fuel from orbiting the planet for like 15 years while the others were down there. So the entire movie rests on the idea that a group of the world's best physicists who had already identified and discussed the time distortion of the planet didn't connect that to the fact that the "12 years of good signals" actually means less than an hour of good signals because of that very time dilation."