Een jonge verpleegster, Quinn genaamd, downloadt een app op haar telefoon die voorspelt wanneer iemand zal sterven. Deze app vertelt haar dat ze nog maar krap drie dagen te leven heeft. Vanaf dat moment begint een mysterieus figuur haar te achtervolgen.
Nee, helaas is Countdown nog niet beschikbaar op Netflix in Nederland.
| Camera | Stefano Ben | "B" Camera Operator |
| Sound | John Sheridan | Boom Operator |
| Costume & Make-Up | Marisa Pinuelas | Hairstylist |
| Costume & Make-Up | Stacy Schneiderman | Hair Department Head |
| Camera | Renni Pollock | Second Assistant "B" Camera |
| Costume & Make-Up | Melissa Oliveira | Hairstylist |
| Camera | Nathan Stern | Steadicam Operator |
| Camera | Alex Grossfeld | First Assistant "B" Camera |
| Costume & Make-Up | Kaylie Klone | Hairstylist |
| Camera | Nathan Stern | "A" Camera Operator |
| Costume & Make-Up | Jacqueline Weiss | Hairstylist |
| Costume & Make-Up | Tami Lane | Makeup Department Head |
| Costume & Make-Up | Anthony Veader | Hairstylist |
| Camera | Blake Hooks | Second Assistant "A" Camera |
| Costume & Make-Up | Erica Preus | Key Makeup Artist |
| Costume & Make-Up | Anna Milhouse | Key Hair Stylist |
| Crew | Jeremy Hays | Special Effects Coordinator |
| Camera | Jacqueline Stahl | First Assistant "B" Camera |
| Costume & Make-Up | Jacenda Burkett | Makeup Artist |
| Costume & Make-Up | Tracey Henton | Makeup Artist |
| Camera | Devon Hoff-Weekes | "B" Camera Operator |
| Sound | Geordy Sincavage | Foley Supervisor |
| Crew | Matt Moyes | CG Supervisor |
| Camera | Hopper Stone | Still Photographer |
| Sound | Meredith McBee | Music Coordinator |
| Sound | Tim Tuchrello | Assistant Sound Editor |
| Crew | Tammy Sandler | Unit Publicist |
| Sound | Brendan Croxon | Foley Mixer |
| Sound | Phil Lee | Sound Mix Technician |
| Sound | Monique Reymond | Foley Artist |
| Sound | Branden Spencer | ADR Supervisor |
| Sound | Jamie Famularo | Foley Editor |
| Sound | Alexander Jongbloed | Foley Editor |
| Crew | Steve Polon | Transportation Co-Captain |
| Crew | Gary Preece | Transportation Coordinator |
| Sound | Vincent Guisetti | Foley Artist |
| Sound | Hector C. Gika | Sound Designer |
| Sound | Michael Payne | Sound Effects Editor |
| Production | Ashley Lambert | ADR Voice Casting |
| Sound | Mary Parker | Music Editor |
| Editing | Mark Griffith | Digital Intermediate Colorist |
| Visual Effects | Bryan Binder | Visual Effects Producer |
| Production | Jay Traynor | Location Manager |
| Camera | David Conti | Key Grip |
| Camera | Jason L. Stevens | Dolly Grip |
| Crew | Alma Weaks | Craft Service |
| Camera | Ralph Del Castillo | Dolly Grip |
| Production | May Nejati | Production Supervisor |
| Crew | Yaminah McKessey | Post Production Supervisor |
| Lighting | Noah Cruz | Best Boy Electric |
| Production | Harrison Gunnarshaug | Production Secretary |
| Art | Lima Hyelim Kang | Graphic Designer |
| Art | Megan Soderberg | Art Department Coordinator |
| Art | Marquis Martin | Assistant Property Master |
| Lighting | Sean Smith | Gaffer |
| Costume & Make-Up | Tina Zepeda | Key Costumer |
| Production | Ami Francis | Production Accountant |
| Directing | Noreen Dimster-Denk | Second Second Assistant Director |
| Crew | Lauren Bertoni | Studio Teacher |
| Production | Katherine McCown | Casting Assistant |
| Camera | Richard D. Conti | Grip |
| Art | Rick Staves | Leadman |
| Production | Austin Miller | Production Secretary |
| Costume & Make-Up | Tiffany Lazette Powers | Set Costumer |
| Costume & Make-Up | Devon Simon | Costume Assistant |
| Production | Bill Dance | Background Casting Director |
| Production | Jessie Francis | Assistant Accountant |
| Costume & Make-Up | Deborah Goldstein | Costume Supervisor |
| Camera | Jason D. Habeger | Grip |
| Lighting | Brian Schreiner | Rigging Grip |
| Editing | Gene A. Lewis Jr. | First Assistant Editor |
| Sound | Jason Coleman | Foley Mixer |
| Directing | Justin Dec | Director |
| Writing | Justin Dec | Writer |
| Production | John Rickard | Producer |
| Production | Sean Anders | Producer |
| Production | Zack Schiller | Producer |
| Camera | Maxime Alexandre | Director of Photography |
| Art | Jon J. Bush | Set Decoration |
| Costume & Make-Up | Abby O'Sullivan | Costume Design |
| Production | Rich Delia | Casting Director |
| Art | Clayton Hartley | Production Design |
| Production | John Morris | Producer |
| Production | Robert Simonds | Executive Producer |
| Sound | Joel Dougherty | Sound Re-Recording Mixer |
| Art | Erick Garibay | Property Master |
| Crew | Marc Scizak | Stunt Coordinator |
| Directing | Jane Goldsmith | Script Supervisor |
| Sound | Thomas Curley | Sound Mixer |
| Sound | Sean McCormack | Supervising Sound Editor |
| Production | Gregory Plotkin | Executive Producer |
| Production | Alexander Boies | Executive Producer |
| Editing | Brad Wilhite | Editor |
| Sound | Danny Bensi | Music |
| Production | Adam Fogelson | Executive Producer |
| Sound | Saunder Jurriaans | Music |
| Production | Matthew Medlin | Executive Producer |
| Production | Tyler Zacharia | Executive Producer |
| Sound | Jason Markey | Music Supervisor |
| Production | Max Jacoby | Co-Producer |
| Production | Devin Andre | Co-Producer |
| Production | Nicolas Harvard | Co-Producer |
| Crew | Terrence Julien | Stunts |
| Crew | Keith Campbell | Stunts |
| Directing | Nicolas Harvard | First Assistant Director |
| Directing | Cyndi Martin | Second Assistant Director |
| Crew | Bobby Lee | Stunts |
| Production | Matthew Medlin | Unit Production Manager |
| Crew | Dirk Rogers | Stunts |
| Crew | Lauren Shaw | Stunts |
| Visual Effects | Melissa Brockman | Visual Effects Producer |
| Crew | Allison Caetano | Stunts |
| Crew | Mike Li | Stunts |
| Crew | Shauna Duggins | Stunts |
| Crew | Athena Perample | Stunts |
| Crew | Norb Phillips | Stunts |
| Art | Harrison Hartley | Art Direction |
| Crew | Charles Grisham | Stunts |
