De zussen September en July zijn onafscheidelijk en begrijpen elkaar zonder woorden. Hoewel ze minder dan een jaar schelen, is het altijd September die bepaalt wat er gebeurt. Beide meisjes zijn buitenbeentjes met aparte gewoontes en een onconventionele uitstraling. Ze vullen hun dagen met rituele spelletjes en leven in hun eigen wereld. Wanneer er iets misgaat op school, besluit hun moeder Sheela hen mee te nemen naar een afgelegen huisje op het Ierse platteland. Daar, los van de buitenwereld, worden de meisjes steeds onafhankelijker maar neemt hun gedrag ook een bizarre en verontrustende wending.
Nee, helaas is September Says nog niet beschikbaar op Netflix in Nederland.
| Production | Ed Guiney | Producer |
| Production | Romanna Lobach | Producer |
| Writing | Daisy Johnson | Novel |
| Camera | Balthazar Lab | Director of Photography |
| Writing | Ariane Labed | Writer |
| Production | Isabella Odoffin | Casting |
| Production | Lara Hickey | Producer |
| Camera | Δέσποινα Σπύρου | Still Photographer |
| Directing | Ariane Labed | Director |
| Editing | Bettina Böhler | Editor |
| Art | Lauren Kelly | Production Design |
| Art | Diarmuid Wolfe | Art Direction |
| Directing | Ger Duffy | First Assistant Director |
| Directing | Richard Cosgrove | Second Assistant Director |
| Production | Viola Fügen | Co-Producer |
| Production | Cécile Tollu-Polonowski | Co-Producer |
| Production | Niamh Fagan | Executive Producer |
| Production | Michael Weber | Co-Producer |
| Production | Rachel Dargavel | Co-Producer |
| Production | Claudia Yusef | Executive Producer |
| Production | Greg Martin | Executive Producer |
| Production | Chelsea Morgan Hoffmann | Producer |
| Production | Andrew Lowe | Producer |
| Editing | Dirk Meier | Colorist |
| Costume & Make-Up | Clare Lambe | Makeup Designer |
| Art | Orla O'Connor | Set Decoration |
| Costume & Make-Up | Sandra Kelly | Hair Designer |
| Costume & Make-Up | Saileóg O'Halloran | Costume Design |
| Sound | Johnnie Burn | Sound Designer |
| Costume & Make-Up | Emma Moffat | Key Makeup Artist |
| Sound | Tobias Fleig | Sound Re-Recording Mixer |
| Production | Christine Kelly | Line Producer |
| Directing | Ebony Corcoran | Third Assistant Director |
| Camera | Cait Fahey | Still Photographer |
| Lighting | Tim Fletcher | Gaffer |
| Sound | Rainer Heesch | Supervising Sound Editor |
| Production | Greg Martin | Executive Producer |
| Camera | Richie Egan | Grip |
| Camera | Michael Cafferkey | Grip |
| Sound | Patrick Downey | Sound Mixer |
| Crew | Blayne Fitzpatrick | Compositor |
| Visual Effects | Aaron Carroll | Visual Effects Producer |
| Art | Jack Cairns | Property Master |
| Crew | Joe Condren | Stunt Coordinator |
| Crew | Sean Condren | Stunt Coordinator |
| Art | Orla Collins | Graphic Designer |
| Sound | Johnnie Burn | Original Music Composer |
| Sound | Maximilian Behrens | Sound Editor |
| Crew | Γιώργος Λάνθιμος | Thanks |
| Crew | Γιώργος Μαυροψαρίδης | Thanks |
| Crew | Athina Rachel Tsangari | Thanks |
