| Jessica Raine ... Lucy Chambers |
| Peter Capaldi ... Gideon Shepherd |
| Nikesh Patel ... Detective Inspector Ravi Dhillon |
| Alex Ferns ... Detective Sergeant Nick Holness |
| Meera Syal ... Doctor Ruby Bennett |
| Barbara Marten ... Sylvia Chambers |
| Phil Dunster ... Mike Stevens |
| Benjamin Chivers ... Isaac Stevens |
