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The finer details of that huge final episode.

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Richard Trenholm is CNET's film and TV editor, covering the big screen, small screen and streaming. A member of the Film Critic's Circle, he's covered technology and culture over the past 15 years from London's tech scene to Europe's refugee camps to the Sundance film festival.

The fourth season of Stranger Things  is finished! Did Max shake off the curse? Did Hopper make it back? Can Eddie rock the Upside Down with the most metal performance in history? Will Eleven defeat the monstrous Vecna?

Two extra-long finale episodes hit Netflix on July 1 (although Netflix crashed for some early viewers ). We already recapped Episode 8, titled Papa . So let's dive into the two-hour-long Episode 9, The Piggyback, and recap the climactic plot points, Easter eggs and character arcs. (Plus lots of spoilers!)

Stranger Things is set in 1980s Indiana, where a teen with powerful psychic powers escapes a sinister government installation. Eleven joins forces with local nerds Mike, Dustin, Lucas and Will to battle demogorgons, the Mind Flayer and other monsters, including the chillingly calculating Dr Brenner. 

Episode 8 ended with Brenner dying in the dust of the desert, but he's left a whole heap of trouble behind: His experiments on psychic kids led to Eleven zapping troubled youngster Henry Creel into the parallel dimension of the Upside Down years ago, where he became season 4's demonic villain Vecna.

Meanwhile Sheriff Jim Hopper, Joyce and Murray try to escape a brutal Russian gulag with the help of duplicitous former guard Antonov (aka Enzo) and madcap smuggler Yuri. Episode 9 opens with Jim and Joyce facing the same problem as Eleven, Will, Mike, Jonathan and Surfer Boy brochacho Argyle: They have to get back to Hawkins before Vecna kills again and opens a fourth gate to the dark dimension. Steve, Nancy, Robin, Dustin and Eddie Munson tool up to infiltrate the Upside Down and stake Vecna in his coffin, while Lucas and Erica enter the terrifying Creel mansion to offer Max as bait. In the series finale, only the Hawkins kids (and Kate Bush) can save the world.

In Russia, Yuri keeps stalling (literally) as he pretends to work on his helicopter Katinka. Nearby, Joyce and Hopper undress in tandem, revealing the toll taken on Hopper's body by his stay in the brutal gulag. Yet despite being battered, bloodied, gaunt and shaven of head, David Harbour has possibly never been hotter? Having decided he's a curse on anyone who cares about him, Hopper still found hope in dreams of Enzo's bread sticks and lasagna, not to mention smooching Joyce (in a Hulk Hogan T-shirt).

In Hawkins, Nancy and the crew prepare their Upside Down commando raid. It sounds so simple, right? Dustin and Eddie know they're decoys, but as soon as someone says "We are no heroes," you just know they're going to pull some pretty heroic crap before the credits roll.

As Erica, Lucas and Max explore the creepy Creel house, phase one begins… except a passer-by spots Erica, guiding Jason and his newly acquired handgun to the murder house on Morehead.

The Surfer Boy Pizza crew

On the road, Eleven spots a billboard depicting a happy family and has flashbacks of her mother Terry. If she can enter the minds of her mother or Billy in previous seasons, she realizes can follow into Max's mind and face Vecna. It just means busting into a Surfer Boy Pizza. Luckily they have Purple Palm Tree Delight.

Hopper gets through to Owens' assistant, who brings them up to speed on the danger in Hawkins. In their matching parkas, Hopper and Joyce realize they too can join the fight from where they are. It just means busting back into the Soviet jail. Luckily they have a flamethrower.

Are you ready for the most metal concert in the history of the world? In the Upside Down, Eddie discovers a demonic copy of his ax and rips into Metallica's Master of Puppets to draw a horde of demon bats across a hellish dark dimension. I love how it isn't just Eleven bringing her superpowers to the fight. The unique personalities of ordinary folk play a crucial role, as Argyle's pizza-making and Eddie's shredding also help save the world. 

You might be forgiven for forgetting Jonathan was there this season as he's mostly been in the background of a show with so many characters. But in one of the season's heartfelt intimate moments, he reconnects with Will. In another poignant moment, following Steve's speech about kids in episode 8, he shares another vulnerable heart-to-heart with Nancy in this episode. Oh, he's really going to die, isn't he?

As Max listens to her secret weapon, Kate Bush, she and Lucas exchange cute notes. Then she turns off her Walkman. 

But it doesn't work. Eleven can see Max, but the guest of honor is a no-show. Max digs deeper into the taunting that Vecna aimed at her and faces her own emotional demons by acknowledging her darkest thoughts about her late brother Billy. And she admits that her bravery and possible sacrifice is rooted in self-loathing rather than nobility. Finally, Vecna makes his presence felt by cruelly impersonating Lucas and then Billy. Meanwhile, Eleven is already projecting herself to the Creel house, and then takes another step into Max's mind as she finds herself amid a memory of Max skateboarding. 

It's time for phase three.

Max finds herself in the Hawkins Middle School Snow Ball of 1984 as The Police's 1983 mega-hit Every Breath You Take plays -- just like at the moment when Lucas and Max kissed at the end of season 2. Then there's a striking image of balloons bursting in a shower of gore as the school dance turns into something darker to the strains of Dream a Little Dream of Me by Ella Fitzgerald -- the song playing on the radio when Henry Creel murdered his family. 

In the Upside Down, Robin and Steve and Nancy are all grabbed by choking tentacles as Eddie and Dustin go into bat-tle. (Battle, geddit?) To help Dustin escape, Eddie heads back into the Upside Down for a sword fight with a swarm of demon bats. See? Hero crap. Called it!

Lucas realizes he never wanted to be popular and normal, but his fight with Jason smashes Max's musical lifeline. Fortunately, Eleven hits the dancefloor just in time to face the demon she inadvertently created.

The creature formerly known as Henry Creel regains the upper hand, crucifying Eleven against the now-familiar door of the murder house as Max is raised up to become the final sacrifice. Eleven deploys not her telekinetic powers, but her empathy for Henry. Unfortunately it doesn't land as Henry doesn't blame the ordinary, mediocre man Brenner for turning him into Vecna. He blames Eleven.

From Russia with love in Stranger Things season 4.

In a flashback, we see Vecna/Henry/One explore the Upside Down, a realm he sees as unspoiled by humans. He becomes "the predator he was always meant to be" with the aid of the hideous Mind Flayer. "It was always you," sobs Eleven as she flashes back to the Mind Flayer's possession of Billy's form in earlier seasons, realizing it was actually Vecna seeking to open gates from the Upside Down.

Whereas '80s pop helped Max escape Vecna, now it's Mike's words that are music to Eleven's ears as he finally says "I love you." With or without powers, she's his superhero. It's notable that this season is built around families and friends maintaining their connection to one another no matter how far away they are. Things go wrong when characters stop talking, like Jonathan and Nancy, or Lucas snubbing the Hellfire Club, or even Henry Creel turning on his family. But Mike and El's love letters, Hopper's dream of date night, Max's notes, Mike calling to Eleven as she in turn reaches out to Max -- these are all people shouting their love for one another, refusing to let their connection fade.   

In an epic climax that will surely have everyone cheering, Running Up That Hill swells as Eleven blasts Vecna with her signature move. Joyce and Jim strike down the final demogorgons while Steve and Robin hurl Molotov cocktails. And Nancy? She doesn't miss. 

But the victory is bittersweet as Eddie dies in Dustin's arms. The moment is a little undercut as none-more-metal Eddie drifts away to the strains of Moby, but it's still sad.

And Max, broken and blinded, dies in Lucas' arms -- completing Vecna's quartet of kills. The words of the apparently defeated villain ring in our ears ahead of the fifth and final season. 

"This is only the beginning," Henry/Vecna warns Eleven. "The beginning of the end. You have already lost." As the clock chimes, a terrifying vast gate tears open the town of Hawkins. What an ending! The villain defeated, but an even bigger threat looms! What a cliffhanger!

Er, yeah, except there's still 30 minutes left.

The last half hour is full of emotional payoffs with the gang emotionally reuniting amid the fallout. Two days later, a "7.4-magnitude earthquake" has rocked the town, killing and injuring dozens of people. To add insult to injury, the heroic Eddie Munson and the innocent Hellfire Club is blamed for satanic goings-on. Still, at least Dustin is able to tell Eddie's uncle the truth (mostly).

Having already saved the world, the gang volunteers to help the relief effort. Robin's crush, Vickie, joins her on PB&J duty, and it seems that romance may be on the cards after all. Hopper and Joyce have a tearful reunion with Eleven, who searches a dark and empty mindscape for Max -- who it turns out is alive but in a coma.

Chillingly, Will still has a connection to Vecna/Henry/One after his possession in season 2. And he knows that the terrifying demon is hurt, but still out there. The hairs on the back of his neck stand up as clouds gather and weird particles rain down on the people of Hawkins, poisoning plants and opening a fearsome portal. This is a repeat of the moment in season 2 episode 1 where Will saw a vision of the Mind Flayer before it possessed him -- except this time everyone can see it, because it's actually happening... 

And so the stage is set for Stranger Things season 5!