Black Mirror Brainstorm
A Black Mirror Brainstorm is a product design exercise in which small teams imagine their own product or feature as the premise of a dystopian television episode and work out how a well-meant idea could end up harming people. It was described by designer Joshua Mauldin in 2018 and borrows its name and framing from the TV anthology series Black Mirror, with which it has no affiliation. The fictional frame makes it easier to say uncomfortable things about one's own work, and the patterns across the teams' stories become concrete risks and anti-goals for the real product.
Facilitation script
- 1
Introduce the exercise and its purpose, form teams of three to five and assign or let teams choose the product or feature to work on.
5 min - 2
Teams brainstorm harms on sticky notes, covering the direct user and people around them.
10 min - 3
Teams choose one dark turn, write the character quote and outline the episode: intended beneficiary, good intention, how it failed, who was affected.
10 min - 4
Teams draw the episode poster with title, synopsis and image.
10 min - 5
Poster presentations, two minutes each, with the group noting recurring themes on a shared list.
12 min - 6
Reflect on the themes, translate them into anti-goals and concrete checks for current and upcoming work, and assign owners.
13 min
Tips
Push teams towards plausible harm that follows from the product's actual mechanics and incentives; killer-robot plots are fun and tell you nothing.
Asking for the good intention first keeps the exercise honest, because most real harm starts from one.
Do not skip the last step: the posters are the means, and the list of anti-goals and follow-up checks is the output.
Keep the tone light enough that people speak freely, and say clearly that nobody is being accused of planning the dark version.
Common pitfalls
Teams drifting into far-fetched science fiction, which produces entertaining posters and nothing the product team can act on
Ending after the presentations, so the session is remembered as a fun exercise and no anti-goal or design change follows
Looking only at the direct user and missing bystanders, excluded groups and people who are affected without having signed up
A sponsor or product owner defending the feature during the sharing round, which stops people from offering the next uncomfortable scenario
Running it once the feature is already committed and scheduled, so every finding meets the answer that it is too late to change
Variations
For a short version, drop the poster and have each team write only the title, the one-line quote and a three-sentence synopsis. Remotely, use a poster template on a digital whiteboard and one breakout room per team. To balance the mood, close with a quick round on what the product would have to do differently for the episode never to be written. With a larger group, give several teams the same feature so that recurring themes show up clearly.
Where it fits
When to use it
A concept is concrete enough to imagine in use but not yet built, so findings can still change the design
The team is enthusiastic about an idea and nobody has yet asked who could be hurt by it
A feature collects personal data, automates a judgement about people or changes how people relate to each other
You want to bring ethics into a product process without a lecture or a compliance checklist
Team members hold private doubts that are easier to voice as fiction than as criticism of a colleague's work
When not to use it
You need to find reasons why the project itself might fail on time, budget or adoption; run a Premortem instead
The product is in a regulated domain and needs a formal assessment; use the exercise as a warm-up for a proper risk or impact assessment, not as a substitute
The harm has already happened to real people; a fictional frame trivialises it, so run an incident review or a facilitated dialogue
You want to map second- and third-order effects systematically; a Futures Wheel gives more structure
Related methods
Frequently asked questions
What is Black Mirror Brainstorm?▾
A Black Mirror Brainstorm is a workshop exercise in which teams imagine their product or feature as the plot of a dystopian TV episode. They describe the good intention behind the idea, how it went wrong and who was hurt, and summarise it as an episode poster. The group then looks for recurring patterns and turns them into risks to design against. Joshua Mauldin described the exercise in 2018.
How long does a Black Mirror Brainstorm take?▾
Plan 45 to 60 minutes. Roughly half goes to brainstorming and building the episode in teams, and the rest to sharing posters and reflecting on what they mean for real work.
How is it different from a premortem?▾
A premortem imagines that the project has failed and asks why, so it finds delivery and adoption risks. A Black Mirror Brainstorm imagines that the product succeeded and spread, and asks what damage it did to people and society. The two complement each other and can be run on the same concept.
Do participants need to know the TV series?▾
No. It is enough to explain the premise: near-future stories in which an ordinary technology with good intentions has gone badly wrong. If the reference does not land with your group, call it a dark future episode and run the same steps.
What should come out of the session?▾
A short list of recurring harm patterns, a set of anti-goals stating what the product must never do, and specific follow-ups such as a design change, a research question or a check to add to reviews. Without these the posters stay a creative exercise.
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Try it freeMethod descriptions on Workshop Weaver are original content written by our team, based on established facilitation practices. This method was inspired by work from Improving Everyday Ethics, 'Black Mirror Brainstorming'; method by Joshua Mauldin, 'Black Mirror brainstorms' (UX Collective, 2018).