Tenet explained: That ending and all questions answered

15 Sep, 2020 John Mendoza No Comments


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Tenet is out now in the US and UK. Don’t forget your mask.


Warner Bros.

So you’ve watched Tenet, Christopher Nolan’s new sci-fi-spy film. Your mind has been suitably blown by the visually stunning action, cool wardrobe and the plot that rewinds backwards and forward through time.

Tenet has made $150 million at the box office — not bad considering many theaters still haven’t reopened and potential moviegoers may be leery about going to see it. Sadly you can’t stream Tenet at home, which would really help us figure out exactly what happened. Like, how did John David Washington and Robert Pattinson prevent World War III?

We’re all in this Tenet puzzle together. Here are a few answers that will hopefully help you out.

Warning: Spoilers ahead. 

Tenet

John David Washington.


Warner Bros.

What’s inversion?

In the future, a technology has been developed that reverses the entropy of people and objects to move backward through time. Entropy is a complicated physics concept which explains why some processes occur spontaneously while their time reversals do not. “Ice melting, salt or sugar dissolving, making popcorn and boiling water for tea are processes with increasing entropy in your kitchen,” according to one explanation. In Tenet’s universe, the Protagonist (John David Washington) is shown a bullet with inverted entropy that returns to its gun. You can tell if a human has been inverted, because they have to breathe special oxygen through a mask — regular air doesn’t go through inverted lungs. If you contact your “forward” self, it causes “self-annihilation,” meaning you kill yourself. Complicated stuff.

What’s the Algorithm?

Nine objects, hidden in nuclear faculties, form an algorithm that reverses the entropy of the Earth. Setting off the Algorithm ends the world.

What is Sator’s plan?

Russian oligarch Andrei Sator (Kenneth Branagh) is in contact with an unknown agency in the future. Sator plans to set off a doomsday device, also known as the Algorithm, that will reverse the entropy of the entire planet. He’s dying from inoperable pancreatic cancer and believes if he can’t live, no one can. Sator travels back to the holiday with Kat (Elizabeth Debicki) in Vietnam when they were both happiest, planning to die there peacefully and set off the doomsday device with a dead man’s switch linked to his heartbeat.

Why is the future working with Sator?

In the future, everything is destroyed. An unknown agency is working with Sator to kill everyone in the past, because they’re responsible. The people in the future believe that reversing the entropy of the Earth will prevent climate change. With no other choice for their survival, they’re willing to destroy their ancestors and threaten their own existence — the grandfather paradox.

Why Sator?

Sator grew up in the Soviet Union in a small community acting as a “closed” or “secret” city with sensitive facilities, such as nuclear research sites with a plutonium production plant. Sator was in the right place at the right time as a teenager, when he dug up a piece of the Algorithm in the rubble of his home in Siberia. The scientist in the future who created the Algorithm has been hiding the pieces back in time, realizing no one should have the technology. The unknown agency charges Sator with recovering the pieces and dropping the finished Algorithm into the “dead drop” in his nuked home town, where they’ll find it centuries from now. The agency buries time-reversed gold bars that Sator digs up for payment.

Who saved the Protagonist at the opera house?

While foiling the terrorist siege at the Kiev opera house, the CIA secures an unidentified object (which later turns out to be a piece of the Algorithm). After retrieving the object, the Protagonist, a CIA agent, is saved by a masked gunman. We see the gunman wearing a red string on his back — the same red string Neil (Robert Pattinson) wears on his backpack at the end of the movie. So it was Neil who saved the Protagonist in the opening gunfight.

How does the ‘temporal pincer movement’ work?

Let’s look at this through the scene where the Protagonist steals the “plutonium” from an armored car for Sator. Half of Sator’s men enter through a portal called a “turnstile,” allowing them to move backward through time, while the other half move forward. Sator makes off with the piece of the Algorithm with the benefit of knowledge shared between the two teams. That’s the “temporal pincer movement.”

How did Kat survive after being shot?

The bullet Sator shoots Kat with is inverted, which in this universe means it could affect her with radiation poisoning as well as regular bullet damage. So the Protagonist and Neil take her through the temporal turnstile so that she moves backward in time, same as the bullet, preventing the radiation. He and Neil then take her to the Oslo “freeport” art storage facility, where they enter another turnstile so that they can all move forward in time again.

Why is Kat under Sator’s control?

In a nutshell, Kat knowingly sold Sator a forged painting. To gain her trust, the Protagonist and Neil try to steal the painting from the “freeport” in Oslo Airport.

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The destroyed building.


Warner Bros.

How did they set off 2 explosions in that building?

In the closed city where the Algorithm is stored, two teams participate in the operation to stop the doomsday device’s detonation. The red team is moving forward in time, while the blue team is time-reversed. They’re using the “temporal pincer movement” over a 10-minute period, with the blue team kept separate from the red up in helicopters. By setting a timer, the red team (those moving forward in time), detonates a bomb in the bottom half of the building at the 5-minute mark, while the blue team does the same in the top of the building by counting backward from 10 minutes to the same moment.

What happened at the end with Neil?

In the Algorithm room, the Protagonist and Ives (Aaron Taylor-Johnson) encounter a locked gate. On the other side, they see the corpse of a masked soldier, who wears a red string on his backpack. One of Sator’s men tries to shoot the Protagonist, but the masked man springs back to life, takes the bullet and unlocks the gate, allowing the Protagonist to prevent doomsday. He then reverses out of the tunnel. We later see the red string on Neil’s backpack, when he reveals that he was recruited by the Protagonist in the future. So the masked soldier who dies is Neil.

Who is Neil?

Here’s a fun fan theory: the identity of Neil may have an extra layer. He has some similarities to Kat — including Pattinson’s dyed blonde hair and posh English accent — and he shows a level of tenderness while nursing her that suggests a deeper connection. Which has led some viewers to speculate that Neil is in fact Kat’s son. We see Kat’s little boy Max during the film, who may have grown up into Pattinson and then been inverted to come back and help the Protagonist defeat his vicious father. Hey, it’s a theory. 

Who is the Protagonist?

The Protagonist travels to London to save Kat from arms dealer Priya (Dimple Kapadia), who believes she must tie up loose ends. The Protagonist shoots Priya, realizing he will go back in time and found the secret organization Tenet.

Correction, Aug. 30: Kat was not inverted when she was shot. The bullet was and risked giving her radiation poisoning.



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