An insurance investigator tumbles onto a series of similar deaths, by brain hemorrhage, of patients of a psychiatric clinic in France where therapy involves a device which can implant visual imagery in the minds of patients, ostensibly to help them relax.
| Actor | Role |
|---|---|
 Rod CameronJeff Keenan | Jeff Keenan |
 Mary MurphyRuth Vance | Ruth Vance |
 Meredith EdwardsDoctor Maxwell | Doctor Maxwell |
 Peter IllingPaul Zakon | Paul Zakon |
 Carl JaffeDoctor Hoff | Doctor Hoff |
 Kay CallardLaura Maxwell | Laura Maxwell |
 Carl DueringBlore | Blore |
| RRoberta HubyVerna Berteaux | Verna Berteaux |
| FFelix FeltonCommissaire | Commissaire |
 Larry CrossBrad Somers | Brad Somers |
| CCarlo BorelliSignore Kallini | Signore Kallini |
| JJohn McCarthyClark Denver | Clark Denver |
 Jacques CeyFrench doctor | French doctor |
| AArmand GuinleFrench farmer | French farmer |
| MMalou PanteraReceptionist (Clinic) | Receptionist (Clinic) |
 Alan GiffordWayne | Wayne |