Mark Kermode

After hearing noises on the other side of a wall, down in the basement where the circuit breaker is, Clark discovers a door, or rather a not door, a wall through which you can walk, which leads him into a whole other building and a whole maze of back rooms.

Here is a clip from the trailer.

I found a place.

Look, I know how this sounds, but you gotta understand, it's massive in there.

I'm not saying I don't believe you.

Okay, I'm gonna come back here with proof.

All right, you filming?

Yeah.

Follow my lead.

That's what I'm trying to figure out.

I've been here every night since I found the place, and I still barely scratched the surface.

All right, just take it slow.

So at the beginning, those endless rooms look a little bit like the set from Severance, you know, the underground bunker when it's just faceless.

But the more you see them, the more they start to look like a kind of bad imitation, mirror imitation of the real world.

There are stairs that don't go anywhere.

There are rooms with pools that aren't quite pools, that no one could swim in them.

And at one point they describe it as it's like as if someone who had never seen a dog was trying to describe a dog.

And more importantly, the room seemed to go on forever.

And then when Clark goes missing, Mary, the therapist, goes looking for him.

and finds herself in this ever-expanding world, closer to her patient than she could ever imagine.