There was no more news from Tom; But Murphy got the news.

"Today is my birthday." Murphy just looked at the camera. Her eyes flickered slightly, trying to dodge, but she forced herself to look at the camera again. "It's a special birthday, because you told me..." Murphy's voice trembled slightly, and finally summoned up the courage to say, "you told me that when you come back, we may be the same age, today, I'm as old as when you left. "

Cooper slowly closed his eyes, and tears fell down. His frowning brow and restless eyelids revealed his inner struggle and pain. He had only been away for a few hours, but he had missed so much. Now looking at Murphy in front of him, he couldn't believe it was his little daughter, He did not dare to think about what he had missed. Even one thought could completely defeat him.

"If you want to come back, hurry." Murphy said, also red eyes, tears fell like this, which completely defeated Cooper's last line of defense.

Cooper just clenched his teeth, his muscles were tight to the extreme, there was no sound and no movement, but the slightly trembling corners of his mouth and shoulders exposed all his emotions, his closed eyes were still dripping with tears, so he sat in the same place, even could not turn his head, so he was helpless and powerless, Let yourself fall apart and forget to cover up.

Silent crying, there is no sound in the whole screening hall, as if you can hear the trivial sound of tears falling on your face, which makes the audience in the screening hall blush, and breeds a feeling of heartlessness. The cruelty and heartlessness from time are torturing every audience.

They can never imagine what it would be like if they missed 23 years of their friends, if they missed the death and birth of their family, as if they were exiled to a no man's land? What's more cruel is that, for myself, it's only two years and a few hours. The gap of unequal time creates a huge gap, which makes people completely defeated without any precaution.

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

The camera leaves 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. Old professor brand has to sit in a wheelchair - for him, he also experiences the baptism of time, and he may never wait for his daughter's return.

"I don't know which situation I am more afraid of, whether they will never come back, or whether they will come back and find that we have failed."

Professor brand has no energy to research, and the first plan still can not find a way to success, now all the weight is on the shoulders of the follow-up research team, and Murphy is one of them.

Murphy still insists, but Professor brand almost gives up. He begins to be trapped in his own theory, refuses to innovate or break, and just repeats himself. He seems to be ready for death. Murphy wants to make a breakthrough, but he has no better theory to support his idea.

So what should Murphy do? Should she keep going?

At the same time, Cooper, Romilly and brand are also facing a difficult choice.

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

All the elements needed for human survival are on Edmonds' planet. Brand thinks Edmonds is very credible; Although man's planet also has survival elements, because of the existence of black holes, man's planet is likely to end up empty, just like Miller's.

But Cooper put forward a different idea, because Dr. Mann was the best of the first group of 12 explorers, and the data he sent was very clear and accurate, asking them to go to his planet, which means that Dr. Mann may be sure that his planet will survive.

Cooper knows that brand loves Edmunds deeply, and he thinks that this may affect brand's judgment. Finally, Cooper and Romilly decide to go to Mann's planet.

Brand wants to go to Edmonds for personal reasons. She admits that when theory can't solve the problem, she wants to make a choice according to her heart.

Is Cooper really selfless?

Of course not!

Cooper's estimate of fuel is based on the return trip included - if Mann's planet does not harvest, then they must decide whether to go to Edmonds and carry out the second plan to avoid human extinction; Or return to earth? In order to go home and meet his children again, Cooper chose to target all the spearheads at brand, then pulled Romilly into his camp, and finally chose to go to man's planet.

At the same time, the situation of the earth has deteriorated further.

Murphy returned to the farm, Tom remained there, but the death rate of corn had risen to 30 percent, and the stock of food was further decreasing; In addition, Tom's son is also suffering from cough - because of the existence of a large amount of dust, the prevalence of lung disease is higher than ever, but Tom refused to let his son leave the farm for treatment. At the beginning, his first son Jesse died like this, and he refused to let his second son Cooper go to this fate.

Yes, Tom followed his father's name with his second son.

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

Then Tom was so stubborn that he almost foolishly waited here; And Murphy escaped from here, because every bit of this space is awakening her memory. More than 20 years later, she still can't respond positively to her memory. Then she hid in NASA and devoted herself to scientific research.

Professor brand died.

Before he died, Murphy rushed to the hospital and met Professor brand for the last time.

Professor brand sincerely apologized to Murphy for lying. He had lost his faith for a long time. He didn't believe that they could save the earth or that someone would come to save the earth. However, for the sake of a little hope that he didn't even believe in, he called Cooper back and sent him into space. In fact, he hoped that Cooper would carry out the second plan, To ensure the continuity of humanity - there's no need for Cooper to come back.

After her father, after her grandfather, another spiritual pillar of Murphy has gone forever - and collapsed.

It was a fatal blow for Murphy. When she told Dr. brand through the video, she finally couldn't hold back her anger. "You know, you always know, right? He told you it was all a hoax. You left us here, suffocated and starved to death. "

Brand was not able to see the video because they were on their way to man's planet.

It's a planet covered with snow and rocks. There's no sign of life at all. They find man and wake him up.

After a short emotional surge, they began to explore the planet under the leadership of man. According to all the data so far, this is the hope of mankind! Although the surface looks very bad, there is a space suitable for human survival under the surface, and even organic plants can be planted here!

Just as all hope was kindled, the message from the spaceship was sent to the planet. Cooper and brand watched the message from Murphy.

"... does my father know? dad? I just want to know, do you leave me here to die? " Murphy asked the camera sadly that she felt she was abandoned. Cooper and brand left the earth with "plan two" and then abandoned everyone else.

This immediately shocked Cooper.

Brand did not know that she tried to defend her father, but Mann said that he knew that the first plan never existed and that Professor brand was ready to implement the second plan from the beginning.

In fact, Professor brand has solved the equation a long time ago, but he needs more information, because that equation can't reconcile relativity and quantum mechanics, and he needs to really see the singularity inside the black hole!

Romilly confirmed Mann's claim that if a black hole is an oyster, then the singularity is the Pearl in the oyster. The gravity of the black hole is so strong that the singularity is always hidden out of the horizon. If they can't see the horizon, they can't see the singularity, so they can't use the equation to transport human beings here - the only solution is to go into the black hole and find the singularity; But no one has ever been able to get into a black hole, so the first solution becomes a dead end.

In the past 40 years, Professor brand has developed four versions of the new equation, all of which are repeating themselves without breaking the theory. Murphy discovered this, and realized that Professor brand never thought about implementing the first plan.

Not only Cooper, but brand's faith collapsed. She began to question Mann. She began to question herself.

So all the efforts and all the persistence are just a lie?