In the future New York City, the Deputy Commissioner of Police is assisted by a robot detective in solving the murder of a scientist.
| Actor | Role |
|---|---|
 Peter CushingElijah Baley | Elijah Baley |
 John CarsonR. Daneel Olivaw | R. Daneel Olivaw |
 Kenneth J. WarrenCommissioner Enderby | Commissioner Enderby |
| SStanley WalshSimpson | Simpson |
 Ian TriggerR. Sammy | R. Sammy |
| RRichard BealeController | Controller |
| JJohn Boyd-BrentClousar | Clousar |
| RRichard BeintShop Manager | Shop Manager |
| PPatsy SmartCustomer | Customer |
 Ellen McIntoshJessie Baley | Jessie Baley |
| HHennie ScottBen | Ben |
 John WentworthDr. Fastolfe | Dr. Fastolfe |
 Naomi ChanceDr. Gerrigel | Dr. Gerrigel |