A London man who loses his memory when he's struck by a falling object develops a way to reconstruct his past.
| Actor | Role |
|---|---|
 Ed SpeleersGreg | Greg |
 Tom SturridgeTom | Tom |
 Cush JumboCatherine | Catherine |
 Nicholas FarrellDaubenay | Daubenay |
 Adrian SchillerDr. Trevellian | Dr. Trevellian |
 Arsher AliNaz | Naz |
 Laurence SpellmanNumber 2 | Number 2 |
 Shaun PrendergastDI Merril | DI Merril |
 Benjamin DaviesDriver | Driver |
| EElias EsserNot listed | Not listed |
| MMaxamillian JohnstoneChild on Stairs | Child on Stairs |
| TTim BruceCharlie Phillips | Charlie Phillips |