WARNING: SPOILERS ahead for Black Mirror season 4, episode 1, "USS Callister."

The premiere episode of first-ever sequel episode, picking up after the events of the season 4 hit. Black Mirror's "USS Callister" alone won 4 Primetime Emmy Awards, including Outstanding Writing for a Limited Series and Outstanding Television Movie. The cast of "USS Callister" is stacked with talent, starring Jesse Plemons, Cristin Milioti, Jimmi Simpson, Michaela Coel, and Billy Magnussen.

Black Mirror season 4, episode 1, "USS Callister" begins with Plemons' Captain Robert Daly being praised for his brilliance aboard the USS Callister spaceship. It's revealed throughout the episode that the real-life Daly, despite co-founding the video game company Callister Inc. with Simpson's James Watson and being its CTO, is unappreciated at work. Daly creates a modded version of Callister's celebrated sci-fi video game Infinity to control and torture digital avatars that are exact copies of several of his co-workers. Ultimately, a new Callister employee, Nanette Cole (Milioti), gets added to Daly's game and leads the trapped crew of the USS Callister to intergalactic freedom.

What Happened To The USS Callister After Going Into The Infinity Wormhole

Daly's Modded Game Was Permanetly Deleted By Infinity's Firewall

After a mind-and-body-bending trip through the Infinity wormhole, the USS Callister made it out of Daly's private universe and entered the full Infinity video game multiverse. The crew returned to their original appearances and all wear black space uniforms, which is presumably the default attire of all Infinity players. Without the control of Daly's Space Fleet mod, which was stripped away by the game's firewall, Daly can no longer harm the USS Callister crew, which got digitally transported from existing only on Daly's computer to Infinity's cloud. The crew now lives in the online multiplayer world of Infinity.

Why Watson Didn't Reappear On The USS Callister

He Appears In The USS Callister Sequel

Because Daly lost access to the USS Callister in his modded universe, his digital duplicate got stuck in his small spacecraft. His modded universe is also deleted around him after being detected by Infinity's firewall. Without having any way to leave the game, the real-life Daly looks to be in some serious trouble. Unless someone comes to check on him at his apartment, which doesn't seem likely considering his isolated lifestyle, the real-life Daly could very well die. The Black Mirror episode doesn't discuss whether there is a fail-safe operation with those VR devices that turns off after a certain amount of time.

What Happened To Daly At The End Of Black Mirror USS Callister

Daly Appeared To Die In The Game & In Real Life

Watson was, interestingly, the only one of the USS Callister crew to not reappear on the spaceship in the online multiverse. Since he sacrificed unimaginable pain – being burned to a crisp by a jet engine exhaust – to bring power back to the USS Callister, his body was presumably burned to space dust. Even though Daly programmed him and the others with an immortality code, that was deleted along with the rest of Daly's modded Infinity universe. It doesn't seem like he made it through the wormhole, so his character may have actually been killed. He is expected to return in the USS Callister sequel.

Infinity's Uplink Wormhole & Christmas Update Patch Explained

Nanette Knew The Wormhole Was Their Only Way Out

After Daly turns Shaina into an alien creature to punish Nanette for sending herself a message in the real world, Nanette spots a wormhole developing within the Infinity game. A coder herself, she discovers that the wormhole is representative of the giant update patch that Daly is adding to Infinity on Christmas Day. Nanette tells the others that this could be their way out of their imprisoned predicament since it proves that Daly's modded server is still connected to the Internet. Nanette theorizes that flying the USS Callister into the wormhole would delete the rogue coding on the spaceship by hitting the system's firewall.

Nanette's plan to fly the USS Callister into the wormhole was met with hesitation and criticism from the crew. Firstly, it would delete them from the game, effectively killing them, but obviously would not impair their actual selves. Secondly, they had to carefully orchestrate how to pilot the USS Callister while Daly was logged in but on pause, like he was when he was getting a pizza delivered. In order for the crew to have enough time to fly the USS Callister into the wormhole, the real-world Daly would have to be distracted. Nanette realizes the perfect way to motivate her real-world self to distract Daly inadvertently: by blackmailing herself.

Nanette's PhotoCloud & Self-Blackmailing Scheme Explained

Nanette Blackmailed Herself In The Real-World

The digital duplicate of Nanette in Daly's modded Infinity game distracts Daly by enticing him to go for a swim, distracting him from his mission. This allows Kabir (Paul G. Raymond) to teleport Daly's omnicorder, a device he wears in-game that is connected to the Internet. After patching in Daly's omnicorder inside the USS Callister, the crew is able to locate the explicit photos that Nanette was talking about, which she uses as leverage against herself. In the real world, Nanette gets texts of her revealing pictures and a mysterious phone call from a disguised voice that tells her she must do exactly what they say.

Desperate and afraid, the real-world Nanette follows the instructions of the video game version of Walton, thinking he's some anonymous hacker. She orders a pizza for Daly, forcing him to leave the game and go to the door. She quietly breaks into the real-world Daly's apartment after Daly's onmicorder gets teleported back to where he left it by the lake in Infinity. This distraction allows Nanette to steal all the crew's DNA from Daly's mini-fridge, including that of Tommy, Walton's young son who Daly had brought into Infinity as a punishment. Before the real Nanette leaves, she swaps out Daly's VR device with a broken one.

How USS Callister's Ending Sets Up Its Sequel "Into Infinity"

Nanette Continues To Lead The Crew In A Dangerous Online Multiverse

The official logline for Black Mirror season 7 finale "USS Callister: Into Infinity" begins with "Robert Daly is dead...", which seems to confirm that he was unable to disconnect from his own modded Infinity universe. Nanette took over as the captain of the USS Callister and was initially amazed by the opportunity to explore the vast Infinity online multiverse. The sequel, however, implies that the online world of Infinity is an extremely dangerous place.

Nanette and her crew will have to fight for survival from other players similar to Aaron Paul's Gamer691. Based on some Black Mirror season 7 images, the "USS Callister" sequel looks to be more action-packed and hopefully just as inventive.