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There are many mysteries in Silo — What's the deal with that weird cloud? How exactly does the safeguard work? — but one of the biggest concerns in Season 3 is the weird voice in the vault.

Who exactly is Camille Sims (Alexandria Riley), the new head of IT, talking to when they speak with that voice? A robot? A person?

We don't know for sure yet, but we do have a theory: Could it be possible that we've already met the voice's owner?

First, a quick recap. Back in Season 2, the currently AWOL Lukas Kyle (Avi Nash) made it to the bottom of the silo in pursuit of a secret code left by a former head of IT. He discovered a tunnel, and was addressed by a robotic-sounding voice that the subtitles credit as "The Algorithm." This voice, we learned, is the same one that communicates with the silo's head of IT in a room called the Vault. As of Season 3, the voice has picked Camille as its go-to contact.

The question is who, or maybe what, is the voice?

Well, the first thing to note is the name: "The Algorithm" sounds unmistakably machine-like, adding to the possibility that the voice could be some kind of omnipotent AI that's running the silo network. But that's only one possibility. And if the voice is in fact human, or at least based on a human, could it be the case that we've already met them?

The voice Camille speaks with is obviously distorted and robotic, but doesn't it also sound slightly familiar? Doesn't it sound, just a bit, like Congressman Daniel Keene (Ashley Zukerman) that we meet in the flashbacks?

The algorithm's voice is uncredited in the show, so we can't say for sure. But it seems obvious that Keene's storyline is building to the silo's origin — something reenforced by the mysterious promo video Apple TV put out just before launch.

Of course, it's worth remembering that the silos were allegedly built hundreds of years before the events of the show. Keene is, presumably, long dead. But is it such a stretch to imagine his voice could have been resurrected in some way, possibly via AI, by the people in control of the silos? We'll have to wait and see.

Silo Season 3 is streaming now on Apple TV, with new episodes dropping every Friday.

We're back for another season of Silo, but this time we're spending just as much time outside as we are in.

Season 3 picks up where Season 2 left off, making it clear that the shocking flashback in last season's finale wasn't just a one-off. Alongside Juliette (Rebecca Ferguson) grappling with memory loss in the present day, the episode also follows congressman Daniel Keene (Ashley Zukerman) and journalist Helen Drew (Jessica Henwick) in the pre-silo days, with Keene's naval pilot sister Charles (Jessica Brown Findlay) heading off on a combat mission that almost gets her killed.

But what's with the mysterious cloud she encounters, and how might it connect with the silo? Let's dive in.

After a peculiar meeting in which she warns her brother to get on the Iran committee run by Senator Thurman (Laura Innes), we see Charles cutting through the clear night sky on a mission with her fellow naval pilots.

All seems to be going well until a weird cloud appears up ahead. It looks almost like a storm cloud, only with long dark tendrils creeping out of it. "What the fuck's a cloud doing at fifty thousand feet?" asks Charles as she and her fellow pilots fly into it.

Inside the cloud a weird, gooey substance shows up on Charles' instrument panel. She touches it, and the residue is reminiscent of the tendrils we saw protruding from the cloud. Shortly after that, planes start to go down around her.

Watching news of an Iran combat mission on TV, Daniel Keene is called into a meeting with the same Senator Thurman running the committee Charles told him about.

"Your sister's squadron wasn't hitting any of the targets they're talking about on TV," Thurman says. "They were on a mission to a facility in the mountains. Charlotte's plane went down, but a facility out of Turkmenistan picked her up. She's alive."

Good news! The problem? When Daniel goes to visit her in her special treatment center, she doesn't remember him.

There's obviously a reason why Charles' unit was sent on a mission to "a facility in the mountains," and you would imagine it has something to do with the bizarre cloud that seems to wreck their planes one by one. Could it be some kind of biological weapon, maybe a new defensive weapon, made by Iran? Perhaps something experimental that the facility they were attacking could have been working on?

It seems possible. But the other big question is, what happened to Charles' memory? Did the cloud, and the gooey substance in her cockpit, affect her neurologically?

Too early to say, but it seems a bit of a coincidence that Charles has lost her memory in the past, just as Juliette has lost her memory in the present. Surely there's a connection there...

Silo Season 3 is streaming now on Apple TV, with new episodes dropping every Friday.

If you like playing daily word games like Wordle, then Hurdle is a great game to add to your routine.

There are five rounds to the game. The first round sees you trying to guess the word, with correct, misplaced, and incorrect letters shown in each guess. If you guess the correct answer, it'll take you to the next hurdle, providing the answer to the last hurdle as your first guess. This can give you several clues or none, depending on the words. For the final hurdle, every correct answer from previous hurdles is shown, with correct and misplaced letters clearly shown.

An important note is that the number of times a letter is highlighted from previous guesses does necessarily indicate the number of times that letter appears in the final hurdle.

Mashable 101 Fan Fave: Nominate your favorite creators today

If you find yourself stuck at any step of today's Hurdle, don't worry! We have you covered.

A kitchen tool.

CORER

Useful.

UTILE

Mashable 101 Fan Fave: Nominate your favorite creators today

Dwelling.

ABDOE

A barrage.

SALVO

The goat.

BILLY

If you're looking for more puzzles, Mashable's got games now! Check out our games hub for Mahjong, Sudoku, free crossword, and more.