Tom was never heard from again, but Murphy did.

"Today is my birthday. Murphy looked at the camera like this, his eyes flickered slightly, trying to dodge, but he still forced himself to look at the camera again, "It's a special birthday, because you told me ......" Murphy's voice trembled slightly, and finally plucked up the courage to say, "You once told me that when you came back, we might be the same age, and today, I'm the same age as when you left." ”

Cooper slowly closed his eyes, tears sliding down his eyes, his frowning brows and uneasy eyelids revealing his deep struggles and pains - he had only been away for a few hours, but he had missed so much, and now looking at Murphy in front of him, he couldn't even believe that it was his little daughter, he didn't dare to think about what he had missed, even a single thought could completely crush him.

"If you still want to come back, hurry up. As he spoke, Murphy's eyes reddened, and tears rolled down his face, which completely broke Cooper's last line of defense.

Cooper just gritted his teeth like this, the muscles all over his body were already tense to the extreme, there was no sound or movement, but the slightly trembling corners of his mouth and shoulders revealed all emotions, and his closed eyes still continued to slide down tears, he sat in place in embarrassment, and he couldn't even turn his head away, so he sat helplessly and powerlessly in place, letting himself fall apart and forgetting to cover up.

The silent crying, there was no sound at all in the entire screening hall, as if the trivial sound of tears sliding down the face could be faintly heard, but this made the audience in the screening hall can't help but redden, breeding an unbearable emotion, the cruelty and ruthlessness from time are torturing every audience.

They can never imagine what it would be like if they missed the twenty-three years of their friends, if they missed the death and birth of their family, as if they had been exiled to a no-man's land?

On the big screen, Cooper sat quietly, without movement or sound, but the strong emotions hit all the audience like a meteor.

The camera moves away from Cooper and follows the end of the video to focus on Murphy, returning from another galaxy to Earth in the solar system.

By this time, Murphy had grown up and joined NASA as a researcher under Professor Brand. The dying Professor Brand had to be confined to a wheelchair – for him, he was also experiencing the baptism of time, and he might never wait for his daughter's return.

"I don't know which one is more fearful, whether it's whether they'll never come back, or whether they'll come back and find that we've failed. ”

Professor Brand had no energy to continue his research, and the first project still failed to find a way to success, and now all the weight was on the shoulders of the follow-up research team, of which Murphy was a member.

Murphy is still holding on, but Professor Brand has almost given up, he is beginning to get stuck in his theory, refusing to innovate and refusing to break, just repeating himself, he seems to be ready to die, Murphy wants to make a breakthrough, but there is no better theory to support his idea.

So, what should Murphy do? Should she keep going?

At the same time, Cooper and Romilli and Brand also faced a difficult choice.

Because it took more time to explore the first planet than expected, and now that there is little fuel left, they have no way to go to the remaining two planets, so they can only choose one of them, one is Edmonds's and the other is Mann's, from the data, Edmonds's data is more reliable, but he has stopped transmitting, and Mann's data is not so convincing, but it is still transmitting.

All the elements needed for human survival are all on Edmonds' planet, and Brand thinks that Edmonds is very credible, although Mann's planet also has survival elements, but because of the existence of black holes, Mann's planet is likely to be like Miller's planet, and in the end it will be empty, which makes Brand think that Edmonds is more hopeful.

Cooper, however, had a different idea, as Dr. Mann was the best of the first twelve-man expedition, and the data he sent was clear and accurate, asking them to travel to his planet, which meant that Dr. Mann was probably certain that his planet would survive.

Cooper knew that Brand was deeply in love with Edmunds, and he thought that this might affect Brand's judgment, and eventually, Cooper and Romilly decided to travel to Mann's planet.

Brand wants to travel to Edmonds' planet for personal reasons, and she freely admits that she wants to follow her heart when theory doesn't solve the problem.

And is Cooper really selfless?

Of course not!

Cooper's estimate of fuel is based on the inclusion of the return trip - if Mann's planet is not harvested, then they must decide whether to go to Edmonds' planet and carry out the second plan to avoid the extinction of humanity, or return to Earth? Cooper chose to target all the spearheads at Brand in order to return home and reunite with his children, and then pulled Romilly into his own camp, and finally chose to go to Mann's planet.

At the same time, the situation on the planet has deteriorated further.

Murphy returned to the farm, Tom was still there, but the death rate of corn had risen to 30 percent, the stock of food was dwindling, and Tom's son was suffering from a cough - because of the large amount of dust, the prevalence of lung disease was now higher than ever, but Tom refused to let his son leave the farm and receive treatment, which was how his first son Jesse died, and he refused to let his second son Cooper go to this fate.

Yes, Tom took the second son after his father's name.

In a sense, Tom, who had given up waiting for his father early, was still keeping his promise in his own way: he promised his father that he would protect the farm.

Then, Tom is so stubborn that he almost stupidly waits here, and Murphy escapes from here, because every bit of this space is awakening her memories, memories that she still can't respond to more than twenty years later, and then hides in NASA and devotes herself completely to scientific research.

Professor Brand has passed away.

Before he died, Murphy rushed to the hospital and saw Professor Brand for the last time.

Professor Brand sincerely apologized to Murphy for lying. He had long lost his faith, he didn't believe that they could save the earth, and he didn't believe that anyone would come to save the earth, but he still called Cooper back for a glimmer of hope that even he didn't believe, and then sent Cooper into space, in fact, he hoped that Cooper would carry out the second plan to ensure the continuation of humanity - Cooper didn't need to come back at all.

After his father, and after his grandfather, Murphy's other spiritual pillar was gone forever – and it collapsed.

It was a fatal blow to Murphy, and when she told Dr. Brand via video, she finally couldn't hold back her anger, "You know, you've always known that, right? He told you it was all a hoax. You have abandoned us here, suffocated to death, starved to death. ”

Brand is not able to see the video, as they are on their way to Mann's planet to explore.

A planet covered in snow and rocks, with no sign of life in sight, they managed to find Man and awaken him from his slumber.

After a brief emotional turmoil, they began to explore the planet under the guidance of Mann, and all the data so far shows that this is the hope of humanity!

Just as all hope was ignited, the message from the ship was transmitted to the planet, and Cooper and Brand watched the message from Murphy together.

“…… Does my dad know that, too? Dad, I just want to know, are you leaving me here to die?" Murphy asked sadly into the camera, feeling that she had been abandoned, that Cooper and Brand had left Earth with a "second plan" and that they had left everyone else on Earth.

This immediately shocked Cooper.

Brand had no idea, and she tried to defend her father, but Mann said that he knew that Plan One had never existed, and that Professor Brand had been ready to carry out Plan Two in the first place.

Actually, Professor Brand had already cracked the equation a long time ago, but he needed more information, because that equation could not reconcile relativity and quantum mechanics, and he needed to really see the singularity inside the black hole!

Romili confirms Mann's claim that if the black hole is an oyster, then the singularity is the pearl in the oyster. The gravitational pull of the black hole is so strong that the singularity is always hidden inside, outside the event horizon. If they can't see the horizon, they can't see the singularity, so they can't use the equation to transport humans here - the only solution is to go into the black hole and find the singularity, but no one has ever been able to enter the black hole, so the first option is a dead end.

Over the past forty years, Professor Brand has deduced four versions of the new equation, all repeating itself without breaking the theory—Murphy discovered this and realized that Professor Brand had never intended to implement the first option.

Not just Cooper, but even Brand's faith collapsed, and she began to question Mann, and she began to question herself.

All the effort and all the persistence is just a lie?