Pitch a Mystery Series Through Its Investigation, Not Just Its Secret

A pitch that says the town keeps secrets tells an evaluator that a secret exists. It tells them nothing about what anyone will do next. The person reading a mystery pitch is not deciding whether the secret is interesting. They are deciding whether they want to watch someone try to find out — fail in a new way each time, and arrive somewhere they didn't expect. That takes a pursuit on the page, not only a concealment behind it.

The working answer: name the question and the person who can pursue it. Say what method they actually have. Put an obstacle in front of the easy answer. Then follow one attempt through a finding, a working explanation, and the action that follows. Keep evidence, someone's assertion, and the investigator's guess visibly separate while you do it. The example running through this piece is invented — a community hall, a record room, a missing clause — and none of its archiving or legal detail should be read as advice.

Give the question an investigator and a workable method

A question needs a shape with an edge on it. "What really happened at the hall?" can't be investigated; it can only be circled. "Who kept the promise out of the record, and does it still hold?" names a document, an act, and a way of being right or wrong.

It also needs an owner. Mara volunteers as the archivist for the hall trust, which has to decide what to do with the building, and her catalogue is going to be in the room when they decide. That gives her three things a pitch has to be able to list: access, a reason to persist, and an obstacle.

Her access is specific. She holds the key to the record room. She can read the bound minute book; the uncatalogued box of loose papers — the secretary's own working papers — that nobody has touched since he retired; and the trust's own agreements, including the 1988 funding agreement and its schedule. She has the addresses of the surviving committee members. Each of those is a different kind of reach, and each will produce a different kind of answer.

Her reason to persist is a job she cannot hand to someone else: her inventory will settle, or fail to settle, a question the residents are already arguing about, and she is the person who agreed to write it.

The obstacle is what makes the story move. The best-looking document, the bound minute book, records no promise at all. It is the most authoritative object in the room, and it supports the answer nobody wants. A less stubborn researcher would stop there and write no record found — which is also why the search has to be driven by someone whose stake won't let her.

Then the verbs, because those are the pitch. In this story, Mara can compare a draft against a fair copy, ask a surviving member what she was actually sent, recover an enclosure that came loose from its letter, check a clause in the minutes against the funding schedule it was copied from, and misread a copying date as a meeting date. That last one is not a flaw in her character. It's the engine of the first episode, and it only works because the pitch has established what she can lay her hands on.

If you can't list the verbs for your own investigator, you don't have a pitch yet. "A town where everyone knows something" is not something anyone can ask, compare, recover or get wrong. And if the investigator's only method is asking questions until somebody finally answers, the plot is doing work the character should be doing. Asking is fine — people find things out by asking — but a method has direction: she is asking a particular person for a particular document she now knows exists.

One boundary worth marking early. If your series is actually about preventing the next move rather than establishing what already happened, you're building a different chain. The attempt still matters, but the finding is a threat you have to act on before you can verify it, and the audience's question changes shape with it.

Write finding, explanation, next attempt

Build a chain, not a pile. A pile is a list of clues; a chain is a sequence in which each step is caused by the one before it. Three components, in this order:

• Finding. What the record, the object, or the person actually shows.
• Working explanation. What Mara now thinks it means. Provisional, and stated as provisional.
• Next attempt. What she does because of that explanation — and what result would break it.

Here is the chain, with the status of each item marked, because a pitch that treats an accusation as a fact has quietly solved its own mystery. (Invented, throughout.)

The promise sits in the 1988 funding agreement's schedule, and neither Joan's memory nor the bound minute book accounts for it. That is the point. Two accounts of the same undertaking now disagree, and only documents can settle which version reached which person.

Notice where the accusation goes. A resident tells Mara that the chair, Renshaw, must have done it. That accusation gives her a next action — check who ordered the copying in March 1989 — without the pitch declaring him guilty. An accusation can drive a scene while remaining exactly what it is: something someone said.

And notice what the chain is doing at the series level. Each settled question leaves a question of the same kind behind it, one that a person with Mara's access could plausibly pursue. A question that can only be answered once is a film. A question that can be asked again in a new form is an engine.

Let an episode answer something

The third step in the table is an episode. Mara spends it proving when the loose page was made, and she gets an answer: 14 March 1989, a day the secretary was making and posting copies. A local question closes.

It also costs her something. The forgery theory dies, and it was the explanation she had been building since the box came open. That cost keeps the episode from being a detour — she is not back where she started, she is somewhere worse. And the answer makes the central question harder: the promise probably was made, which moves the problem from whether it existed to who kept it out of the record.

That is the shape to aim for: a local question resolved, a consequence for the central investigation, and no fresh mystery imported to replace the one you just finished. Pitches that end every episode by opening an unrelated thread end up with five compelling questions and no spine. If your episode needs a new hook to feel like it moved, the resolution you wrote wasn't carrying weight.

One more distinction matters for pacing, because it's easy to collapse. The viewer and the investigator are not asking the same question. An audience three episodes in may already suspect Renshaw; suspicion is not something an archivist can put in a letter. Mara has to reach him through a comparison she can defend. If you know which question each episode answers for the viewer and which it answers for her, apparent delay stops looking like filler and starts looking like method.

Give this pitch reader enough of the answer

Decide what document you are writing before deciding what to withhold. A development pitch for a commissioner, producer, or co-production partner is a different object from a teaser meant for an audience, and a one-paragraph market description is different again. The obligations differ, so the amount of the solution you disclose differs too.

In a development-facing version, give enough of the eventual answer that the evaluator can see the pursuit connects to something. In this example, the answer is that Renshaw circulated documents selectively. The fair copy entered in the minute book and the copies posted to members left the clause out; the secretary's retained copy and the 1988 schedule kept it. The discrepancy was never a forged date. It was a distribution, controlled by one person, shaped by which version went on the record, which went to members, and which stayed behind in the secretary's own file.

Once the evaluator knows that, they can ask the question you want them to ask — does each discovery lead there? If they don't know it, the only question left is whether you do. Withholding the answer in a development document isn't suspense; it's a gap the reader fills with doubt about the writing. In a teaser, withholding is a legitimate choice, deliberately made, and you should be able to say out loud what you're holding back.

A quick test. Write the eventual explanation in one sentence. Then list, in order, the findings that lead to it. If the list is short, you're hiding a problem rather than a solution. Two or three real steps, each caused by the last, is usually enough for a first pitch; the count matters far less than the causality. What you're proving is that the discoveries aren't interchangeable — that a different finding would have sent Mara somewhere else.

If you support the pitch by comparing it to a show that handles information well, keep two kinds of claim apart. What its creators say they intended is one claim. What a scene actually does is another. When you have a script you're entitled to use, put the stated intention and your own reading in separate columns before you blend them into a sentence. Blending is how a pitch comes to sound certain about something nobody checked — and it is also how a writer mistakes a well-described intention for a scene that delivers it.

Replace the withheld fact with a changed action

Here is a sentence that shows up in mystery pitches, and what to do with it.

As Mara digs deeper, another secret emerges — and the truth may be closer than she thinks.

It promises motion while providing none. "Another secret emerges" describes a document appearing, not a person deciding anything. It also conceals whatever the writer hasn't settled: which secret, in what order, and what Mara does about it. The evaluator cannot judge the pursuit, because there isn't one on the page.

The revision uses the same space to show an attempt, a finding, and a change of action:

Mara finds a copy of the January minutes headed with a date the committee never met, and spends the episode proving the date belongs to the copying rather than the meeting. The forgery theory she has been building goes with it. She starts writing to the surviving members, asking what their own copies contain.

The revision doesn't give away the chair. What it gives the evaluator is something to assess: a specific question, a method she can actually use, one attempt that resolves and one explanation that fails, and a next step that follows from both. No reader test stands behind this method — it's editorial judgment and an invented demonstration, which means the test available to you is your own outline. Run the chain on it and see whether it holds.

If you can't say what your investigator tries, what the attempt establishes, and what she does differently afterward, the missing piece isn't a better secret. It's the chain.

Frequently asked questions

What should a mystery pitch name besides the secret?

The question and the person who can pursue it, their method, an obstacle, and a sequence of finding, working explanation, and next attempt. A secret alone does not show what anyone will do next.

How does a question like who kept the promise out of the record differ from what really happened at the hall?

It names a document, an act, and a way of being right or wrong. The broad version can only be circled, while the narrower question gives the investigator something to pursue.

What is the difference between evidence, assertion, and inference?

Evidence is what the record or object shows; an assertion is what someone says or believes; an inference is the investigator's provisional explanation. Keeping them separate prevents an accusation from being treated as fact.

Why does the loose page dated 14 March 1989 not prove forgery?

The committee did not meet then because the hall was closed for repairs, but the date can belong to the secretary's copying and posting of copies. That explanation kills the forgery theory and moves the question to who kept the clause out of the record.

How much of the answer should a development pitch reveal?

Enough that the evaluator can see the pursuit connects to something. In the example, Renshaw circulated documents selectively. Withholding the answer in a development document is a gap, while withholding in a teaser can be a deliberate choice; the method is editorial and the example is invented, so the available test is your own outline.

Further reading

• Who Should Know the Secret First: the Character or the Audience? — A separate method for deciding what the audience learns before the investigator does, useful when a mystery's suspense depends on which question each episode answers for whom.