LeonVera

How we work

How an episode is made, and every place it could go wrong.

Here is exactly what happens between a question and a finished episode, what AI does, what people do, and what catches a mistake before you see it. Everything on this page is a rule we hold ourselves to, written down under Standards.

What AI does

It drafts the research and tags every fact with its source. It writes the script in the character's voice, with a source marker on every claim. It renders what has never been filmed, cuts the episode and lays the sound. And its work is checked against written rules at every step: a second, independent check of every claim, a picture check against the sources, a quality check of every cut and every label.

What people do

Our editorial team decides what we make, and it works unlike a newsroom: AI reads every source, drafts every check and builds every picture; the editors decide. Each show has its own editors, specialists in its field; the editorial board holds the five gates together: the pitch, the script, the pictures, the cut and the release. The rules that matter most stay with them: the characters, the gates and every check, and no check is loosened without their word. Editors read what viewers report and answer when something is wrong.

The seven stages of an episode.

1 The editors say yes

Before anything is made

Every episode starts as a pitch: the question, what you will see, what has to be true, and how sure we can be. The show's editors and the editorial board read it and say yes or no before anything is made.

2 Research

Primary sources only

The topic is worked from three sides: the strongest case for, the history and the context, and the strongest case against. Every source cited is opened, and what does not say what it is quoted for is thrown out. The result is a dossier where every fact carries its source and its grade.

3 Script

In the character's voice

The script is written in the character's voice, with a source behind every claim. A fact without a source goes back before the script moves on. The show's editor locks it.

4 Fact-check

Two independent checks

Every claim in the script is checked at its primary source twice, by two checks that never see each other's work. A claim is green only when both agree. Disagreements are settled from the sources, never averaged. A central claim needs two independent sources, one of them a study, official data or an original document. The same pass checks the law and the platform's rules: health, drugs, living people, advertising.

5 Pictures

Checked before and after

Every scene set in a documented place and time is checked against its visual sources before a picture is made. Every picture is checked again after: does it suggest something the claim does not hold? The picture desk approves, and living people are never generated.

6 Finish

Every cut, every label

Sound, captions from the locked script, and a quality check of the whole master: every cut, a frame every few seconds, every label and number against the claim sheet. The companion booklet lists every source, claim by claim, and says for every key study whether it was replicated. Then the editorial team approves the finished episode, or it does not go out.

7 Release and review

28 days

We read the comments 2, 7 and 28 days after release, and a mistake can be reported by email at any time. A reported error goes to the fact-checker, never to the character. A confirmed mistake is corrected in the channel, in the description and the pinned comment, and we say why it happened.

Every place it could go wrong, and what catches it.

What could go wrongWhat catches itWhat you see
A source is misreadTwo independent checks at the primary source; a claim is green only when both agreeThe source in the description and the booklet
A number is read in the wrong unitEvery label and every number is checked against the claim sheet before releaseUnits spoken and shown in metric, with their source
A picture suggests something the claim does not holdThe picture check: every documented scene against its visual sources, before and after it is madeHow sure we are, on the scene
A quote is inventedEvery quote is matched word for word at its source; invented words are marked as inventedThe mark on screen
A real person is shown who never agreed to itLiving people are never generated; people of the past only when dead for more than 70 years, with a documented appearanceReal people only as objects: a photo, a document
The evidence is thinner than it soundsThe certainty is named: the exact verb, the size of the evidence, and "we don't know yet" where it is trueThe character says it, out loud
A character seems humanOur characters never claim to be human; in the first seconds they do what no person can; every episode carries the AI labelThe label on every episode
We get it wrong anywayThe comments are read at 2, 7 and 28 days; a reported error goes to the fact-checker; a confirmed mistake is corrected in the channelThe correction, with its cause, where you watched

Every picture, checked twice. Before it is made, and after.

The picture desk

Before

Every scene set in a documented place and time is checked against its visual sources first: the excavation plan, the fossil, the probe's images. The show's look book sets how every picture of that show is made.

After

Every finished picture is read against the claim it stands next to: does it suggest something the claim does not hold? If it does, it goes back.

On screen

Every picture carries how sure we are: real evidence shown as it is, rendered from the evidence, or we don't know yet. Each show keeps its own words for it.

Never

No picture that could pass as a real recording of a real event. No living person generated. Everything generated is the world of the show; everything real is an object inside it.

One claim, every check it passed.

From an episode of Tycho Takes Off, as it was checked
The line in the script

"Light from Io takes 33 to 54 minutes to reach Earth." On screen, the place line: Io · 33–54 light-minutes.

What it rests on

NASA NSSDCA, Jupiter Fact Sheet: distance from Earth, 588.5 to 968.5 million km · grade A, official data
NIST CODATA 2022: the speed of light, 299,792,458 m/s · grade A, official data

The arithmetic

588.5 and 968.5 million kilometers at the speed of light give 32.7 and 53.8 minutes. The script rounds to 33 and 54.

The checks

Confirmed at both sources by the first check on 24 October 2026. Checked again, independently, from the claim and the locators alone. Both agree, so the row is green.

On screen

The show's own label: modeled, computed. The number is not a measurement of a light ray; it is calculated from two measured values.

In the booklet

The claim, its minute in the episode, both sources with their pages, and the range.

How sure we are, on every scene.

Every scene that makes a claim shows how sure we are. The show's own device on screen says what the picture is, where it comes from and how far the evidence carries it. The studio uses the same grammar for every picture on this site:

RenderedTitan, the surface·source: Huygens descent images, ESA/NASA 2005·how surehigh
Real evidenceCassini radar map of Titan·source: NASA/JPL PDS·how sureshown as it is
We don't know yetWhat the lakes smell like·no measurement exists·how suresaid out loud

Examples. Rendered: drawn from the evidence; real evidence: a document, a photo, a measurement, shown as it is; we don't know yet: nobody has measured it, and the episode says so.

Shown as it is: a measurement, a document, a photo.
High: computed or reconstructed from measured values and established physics, with the sources named.
Best evidence: supported by studies or records that leave gaps; the episode names the size of the evidence.
We don't know yet: no measurement exists, and the character says so.

Each show keeps its own words on screen: Tycho says observed, modeled or imagined; Harper ends with a verdict. This site uses one grammar for its own pictures.

The rules behind every stage →