The advice is so common it barely gets argued anymore: cut the prologue. Agents are tired of them, readers skip them, and whatever is in there can be worked into chapter one. That advice is not wrong. It is just aimed at a form your serial is not.
In a bound novel, a prologue is three pages a reader crosses in ninety seconds on the way to chapter one. If it is weak, they skim it, forget it, and meet your protagonist anyway. The cost of a bad prologue in print is a mild annoyance absorbed almost instantly.
In a serial, that same prologue is an entire release. It is the only thing a new reader has for a week. It is the first thing the platform shows every person who arrives after that, for as long as the story exists. The cost of a weak prologue is not larger than in print. It is structurally different.
What a prologue is actually for
A prologue exists to carry information the protagonist cannot yet carry. That is the whole job. If your point-of-view character can plausibly know it, notice it, or say it in chapter one, it does not need a prologue; it needs a paragraph.
What a protagonist cannot carry is usually one of three things: something that happened before they were born, something happening elsewhere that they will not learn about for months, or a perspective that would collapse the story if they held it. Everything else is throat-clearing dressed as structure.
So the test to apply before writing a word of it is not "is this interesting" but "is this unreachable from inside chapter one." Interesting is not the bar. Unreachable is.
Why the standard advice does not transfer
The case against prologues assumes a reader holding a whole book. They can flip forward. They can see that chapter one starts on page eleven. The prologue is a speed bump on a road they have already committed to driving.
Serial readers have committed to nothing. They arrived from a genre page or a recommendation, they are giving you ten minutes, and there is no page eleven yet. Whatever you publish first is not an appetizer before the story. For a week, it is the story.
That cuts both ways, and it is the part the standard advice cannot address, because the standard advice is not thinking about release schedules. A serial prologue gets something a print prologue never gets: a full week of undivided attention, with no chapter one to rush toward. Used well, that is a gift. Used badly, it is a week of your reader sitting alone with your weakest writing.
Three shapes that work in serial release
The cold open on a scene the story will return to. A moment of high tension, dropped in without context, that the narrative will eventually arrive at and explain. This works in serial because the gap between the promise and the payoff is measured in weeks, and the question stays alive in a way it cannot when a reader can simply keep turning pages. The discipline it demands: the scene has to be legible as a scene on its own, not a teaser trailer of disconnected images.
The far-past inciting event. The bargain struck three centuries ago, the crime the town buried, the founding act the present story is still paying for. This shape earns its keep when the past event has to be dramatized rather than summarized, and when the reader knowing it creates dramatic irony that the whole serial then runs on.
The voice of an antagonist the reader will not meet for months. A short passage in a perspective the protagonist will never have access to. In print this is a curiosity. In serial it is a slow-release device: every subsequent chapter gets read through the memory of that voice, and the reader carries it for the entire runway before the character walks on stage.
All three share one property. They give the reader something to hold during the wait. That is the criterion. A serial prologue must survive the gap between installments, which is the same standard your chapter hooks have to meet.
Two that reliably fail
Worldbuilding exposition. The history of the empire, the rules of the magic, the map in prose. In print this is a skimmable block. As a serial installment, it is a week in which nothing happens to nobody. Readers do not fail to understand it; they fail to care, because caring requires a person to care about and you have not introduced one yet.
The dream. A tense, vivid sequence that the reader then learns did not happen. In a book this costs a shrug. In a serial you have spent your entire first release establishing stakes and then formally announced that those stakes were fake. It is the one opening that actively teaches a new reader not to trust your escalation.
Your prologue is also your permanent shop window
Here is what has no print equivalent. Chapter one of a finished novel is read once, in sequence, by someone already holding the book. Your serial prologue is read by every new arrival for the life of the story, first and often in isolation, by someone deciding in ninety seconds whether to follow.
A useful exercise: read your prologue as if it is the only thing you have ever written that anyone will see. If it does not survive that reading, it will not survive being the front door for the next two years.
It also means a prologue is worth revising later, which almost nobody does. If your story finds its voice by chapter twenty, the front door is still showing chapter zero. Going back is not cheating. It is maintenance.
The honest alternative, and what it costs
Most prologues can be folded into chapter one. The far-past event becomes something a character remembers. The antagonist's voice becomes a rumor. The cold open becomes an in-scene flash. This is the safer choice and often the better one, especially if your prologue was never clearing the unreachable bar.
Be clear about what you give up, though. Folding costs you the dedicated week of attention, the tonal contrast between the prologue voice and your narrator, and the dramatic irony that only works when the reader knows something before the protagonist does. Sometimes those losses are worth paying, and sometimes the prologue was the right structure all along.
The question is never whether prologues are allowed. It is whether this one carries something chapter one cannot, and whether it can hold a reader alone for a week. If it does both, write it. If it does neither, it was a paragraph.
If you are thinking about openings, it is worth reading this alongside what TV pilots teach about opening chapters, how to pace a serialized novel chapter by chapter, and the way a dual timeline handles the same problem of information the present cannot carry.