Spies pursue a stolen diary aboard the Orient Express.
| Actor | Role |
|---|---|
 Jean KentValya | Valya |
 Albert LievenZurta | Zurta |
 Derrick De MarneyGeorge Grant | George Grant |
 Paul DupuisDetective Inspector Jolif | Detective Inspector Jolif |
 Rona AndersonJoan Maxted | Joan Maxted |
 David TomlinsonTom Bishop | Tom Bishop |
 Bonar ColleanoSergeant West | Sergeant West |
 Finlay CurrieAlastair McBain | Alastair McBain |
 Grégoire AslanPoirier, the chef | Poirier, the chef |
 Alan WheatleyKarl/Charles Poole | Karl/Charles Poole |
 Hugh BurdenMills | Mills |
 David HutchesonDenning | Denning |
 Claude LarueAndrée | Andrée |
 Zena MarshallSuzanne | Suzanne |
| LLeslie WestonRandall | Randall |
 Michael WardElvin | Elvin |
 Eugene DeckersJules | Jules |
 Dino GalvaniPierre | Pierre |
| GGeorge De WarfazChef du Train | Chef du Train |
 Gerard HeinzAmbassador | Ambassador |
 Michael BalfourSpiegel | Spiegel |
 Robert RiettiVincent (voice) | Vincent (voice) |
 Merle TottenhamMiss Smith | Miss Smith |