Onslaught (2026): Full Cast and Ending Explained
- Onslaught opened on 4 September 2026. It runs 92 minutes, is directed by Adam Wingard, written by Simon Barrett and distributed by A24.
- Three genetically enhanced supersoldiers escape a secret desert military laboratory. The one called The Butcher leads them.
- Celeste, an Army veteran running a New Mexico trailer park, and her daughter Daisy both survive, as does her neighbour Josiah.
- The soldiers are the threat, not the villain. Hanna Kammler — Rebecca Hall — appears to hold the real authority, above the government operative handling the survivors.
- There is no post-credits scene as such. The credits carry a run of images that end on a map of Alaska.
- Critics were split rather than hostile: 57% of 84 on Rotten Tomatoes, 60 on Metacritic.
- Nobody at this site has watched it. There is no review here, only the published scores.
Three engineered soldiers get out of a lab in the desert and walk into a trailer park. The ending’s real move is showing you they were never the ones in charge.
Onslaught opened on 4 September 2026. Here is the cast, what happens, and what the credits are pointing at.
The essentials
| Released | 4 September 2026 |
| Director | Adam Wingard |
| Writer | Simon Barrett |
| Runtime | 92 minutes |
| Distributor | A24 |
| Rotten Tomatoes | 57% of 84 critics |
| Metacritic | 60/100 from 24 critics |
Split rather than savaged — the sort of numbers that mean the film does one thing well and something else not at all, and reviewers disagreed about which was which.
The full cast
| Actor | Role |
|---|---|
| Adria Arjona | Celeste — an Army veteran managing a New Mexico trailer park |
| Rebecca Hall | Hanna Kammler |
| Dan Stevens | Dr. Hans Kammler |
| Alex Pereira | The Butcher |
| Drew Starkey | Cyrus |
| Reginald VelJohnson | Josiah |
| Michael Biehn | Baylor |
| Eric Wareheim | Kovacks |
| Maurice Greene | Teddy |
| Jacob Scipio | Griffin |
| Blake Kennedy | Daisy — Celeste’s daughter |
One note on a name. One widely read explainer calls the surviving neighbour Isaiah. The credits-based cast list and a second explainer both give Josiah, which is what this page uses.
⚠️ Spoilers start here
Everything below gives away the ending.
What happens
Three genetically enhanced supersoldiers escape a secret military laboratory in the desert. They reach the trailer park Celeste manages, and the film becomes a siege: a mother with military training, her daughter, and a handful of neighbours against three things built to be unstoppable.
The one called The Butcher leads them. One outlet gives the other two the nicknames Cockroach and Crybaby; that detail is single-sourced.
Who built them: Dr. Hans Kammler, inside a military weapons programme. One outlet describes the programme’s intended purpose as population control and mass-casualty work, and places Kammler in the lineage of the post-war scientist-recruitment programme rather than as a figure from that era himself. Single-sourced, and flagged.
And they turn on him. One outlet has Kammler and his team killed by the three early in the film — again, one source.
The ending explained
Celeste and Daisy survive. So does Josiah. Confirmed by two outlets each.
But the ending is not really about who is left standing. It is about who arrives afterwards.
The survivors are relocated by a government operative named Cyrus — and Cyrus does not appear to be the one deciding. Two outlets place Hanna Kammler above him, directing the operation despite his being the one with the government job.
That is the reversal the poster does not carry. The three soldiers are the threat on screen. They are also somebody else’s equipment, and the person who owns the programme walks away from the wreckage with a result.
One outlet goes further and describes Hanna treating the attack as a field test, with the credits hinting at an interest in weaponising exactly what Celeste did to protect her daughter. That reading is single-sourced, and it is the most interesting thing in the film if it holds.
Who survives
| Confirmed survivors | Celeste, Daisy, Josiah |
| Confirmed dead | Dr. Hans Kammler |
| Not individually checked | Baylor, Kovacks, Teddy, Griffin, The Butcher |
That third row is not coyness. One outlet writes that nearly every other named character is killed. That is a single-sourced generalisation covering five people, and turning it into five individual deaths would be inventing detail the reporting does not contain.
If you have seen the film, you know more than this page does about those five. It will be resolved when a transcript exists.
Is there an end-credits scene?
No — but there is something, and you should stay.
What runs over the credits is not a scene with actors in it. It is a sequence of images: missing-person material for the trailer park residents, fragments of the investigation into what happened, and then, as the last one, a map of Alaska.
Three outlets describe it the same way, which makes it the most solidly attested thing in this article.
What it means, plainly: the survivors have been erased. To the public they are missing people from an unexplained event, and the map is where they have been put. The relocation is not protection so much as storage — three people kept somewhere cold and quiet, by an organisation that now knows what one of them is capable of.
The bottom line
The soldiers get out, the trailer park pays for it, and three people walk away into a filing cabinet in Alaska.
Celeste survives. Daisy survives. Josiah survives. Dr Kammler, who built the things, does not.
And the last image is not a monster. It is a map — which is the film telling you the programme is still running, and that it has a new subject.
Cast, runtime and scores from the film’s credits-based listing. Plot and ending assembled from published recaps of the 4 September release, cross-checked and labelled with how many outlets confirmed each claim. No transcript existed when this was written. Nobody at this site has watched the film; there is no review here.