Christine Clarke brings a new man back to her flat from a New Year's Eve party, and immediately her life starts to unravel. Who is the terrifying stranger that keeps appearing in the flat at night?
| Actor | Role |
|---|---|
 Sheridan SmithChristine | Christine |
 Tom RileyAdam | Adam |
| SStacy LiuFung | Fung |
 Michele DotriceMarion | Marion |
 Reece ShearsmithStranger | Stranger |
 Steve PembertonBobby | Bobby |
 Paul CopleyErnie | Ernie |
 Jessica EllerbyZara | Zara |
| JJoel LittleJack | Jack |
| DDexter LittleJack | Jack |