Black Mirror USS Callister Into Infinity ending explained from Tommy's death to Daly's secret

WARNING: This article contains major spoilers from Black Mirror USS Callister: Into Infinity

has unveiled the seventh season of , featuring six more cautionary tales of technological horror and fascination.

The new episodes include Hotel Reverie, Common People, Plaything, Eulogy and Bête Noire, as well as the eagerly awaited sequel to 2017's USS Callister.

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USS Callister: Into Infinity revisits the crew after their daring escape from video game genius Robert Daly's (portrayed by Jesse Plemons) computer system and through a wormhole into uncharted territory.

Into Infinity resumes months following the demise of Callister Inc.'s chief technical officer, Daly, with the crew frantically attempting to survive by stealing other players' tags in the cloud, reports .

Meanwhile, in the real , Callister Inc.'s CEO James Walton (Jimmi Simpson) finds himself under scrutiny when a journalist questions him about the mysterious users robbing subscribed players.

The journalist insinuates sinister happenings within the game.

Once again, Into Infinity is a heartfelt tribute to all things nerdy, packed full of pop culture nods and .

Here are some key plot points from USS: Callister: Into Infinity.

The sad end of Tommy

Tommy Walton (Tom Mulheron) was Walton's son, whom Daly cloned and brought aboard the USS Callister.

In a tragic turn of events, Daly threw a child out of an airlock to his death while the boy's father watched in helpless horror.

This was Daly's cruel punishment for Walton and the crew who had attempted to escape his eternal USS Callister torture chamber, where they were forced to cosplay and reenact scenes from the TV show Space Fleet.

Robert Daly's death

As depicted in USS Callister, Daly met his end inside his game after the crew managed to distract him long enough to reach the wormhole - a update patch that was preinstalling itself.

Despite his desperate chase in an abandoned ship, the crew made it through the wormhole and escaped him.

The update was picked up by Daly's computer, disabling his controls and leaving him trapped forever in the game, effectively dead in both the real world and Infinity.

Shania's absence

Michaela Coel's character Shania Lowry was conspicuously missing from the episode, with viewers learning she had died on a recent mission.

Her demise underscored the peril the crew now faced as they battled for their survival.

Walton is brought back from the dead

The original USS Callister episode concluded with Walton sacrificing himself so the rest of the crew could break free from Daly's grasp.

He was incinerated by the ship's engines as he restarted them, aiding the others in their escape from Daly's computer.

However, Into Infinity discovered a version of Walton had survived due to fragments of his DNA still existing after he was burnt.

Walton had transformed into a real-life Castaway on a desolate planet, sporting a ragged beard, a scanty loincloth and a primitive version of Wilson (a rock with a hole in the back).

Walton's shocking revelation

Walton confessed that he'd exploited illegal cloning to create a clone of Daly, who was tasked with the endless job of developing, creating and expanding the video game Infinity.

A clone of Daly had been toiling away in Walton's garage for nearly 500 years (in his time), constructing and designing new worlds, while Walton reaped the financial benefits from the enslaved clone's labour.

This clone of Daly was concealed at the core of Infinity and Walton stated that they needed to reach him if they were to escape the video game.

The real Walton

Regrettably, the actual Walton intended to eliminate the clones as they served as proof of Infinity being established using prohibited technology.

He attempted to infiltrate USS Callister by masquerading as his clone, but his coffee order blunder led to his swift disarmament.

Nevertheless, he succeeded in sending a mass player invite to all those the crew had stolen player tags from, placing them in grave danger.

Daly is still alive (kind of)

Nanette Cole (Cristin Milioti) encountered a younger version of Daly at the centre of Infinity, with Plemons reprising his role.

She pleaded with him to assist them in escaping the game, a request he agreed to. However, he declined to simply remove them - instead, he wished to maintain their clones within Infinity.

Furthermore, he desired Nanette's company so he wouldn't be alone.

Daly's arc from geek to evil genius

Those curious about Daly's intentions from USS Callister received a definitive answer from Into Infinity: Daly was overly powerful.

His megalomania fully manifested when he removed Nanette's mouth - much like in the original episode.

In reality, Daly had been ridiculed and scorned by his colleagues, and it was only through cloning that he could exercise power.

Creator Brooker previously stated in the book Inside Black Mirror: "He's mistreating people horrifically. Even though he feels this is some sort of digital realm, when he's throwing a child out of an airlock, that's like Darth Vader levels of evil."

He went on to say: "I've got elements of sympathy with somebody wanting to lose themselves in a fantasy world, because real life is depressing. Fine. The problem is Daly has dragged a lot of people in and he's a f***ing sadist. And he knows he's a sadist."

He added: "He knows exactly what he's doing, because he helped to create it."

The crew's escape from Infinity

For a brief moment, it seemed as if Daly would assist them, but the situation quickly spiralled into chaos.

A heated confrontation took place between Nanette and Daly, during which she knocked him out and frantically searched for the right floppy disc to enable their escape from the game. Due to Daly's lack of organisation in labelling his discs, Nanette was forced to take a risk and select one.

Nanette successfully returned to her physical body, which had been left in a comatose state in the real world after a car accident.

She regained full consciousness and resumed her existence in the real world. However, in a classic Black Mirror twist, the USS Callister crew found themselves trapped within her consciousness, reminiscent of the film Inside Out.

The final scene

The crew were forced to adapt to their new reality, with Nanette vowing to help them escape from her consciousness while she continued to live her life.

They reached a compromise where they could watch Real Housewives.

Meanwhile, Infinity and Daly were completely obliterated by a 606 kill switch, with the real-life Walton facing retribution for his crimes.

Black Mirror season 7 is streaming now