 Howard KeelBill Masen | Bill Masen |
 Janina FayeSusan - Child on the Train | Susan - Child on the Train |
 Nicole MaureyChristine Durrant | Christine Durrant |
 Janette ScottKaren Goodwin | Karen Goodwin |
 Mervyn JohnsMr. Coker | Mr. Coker |
 Kieron MooreTom Goodwin | Tom Goodwin |
 Ewan RobertsDr. Soames | Dr. Soames |
 Alison LeggattMiss Coker | Miss Coker |
| GGeoffrey MatthewsLuis de la Vega | Luis de la Vega |
| GGilgi HauserTeresa de la Vega | Teresa de la Vega |
| JJohn TateCaptain - SS Midland | Captain - SS Midland |
 Carole Ann FordBettina | Bettina |
| AArthur GrossFlight 356 Radioman | Flight 356 Radioman |
| CColette WildeNurse Jamieson | Nurse Jamieson |
 Ian WilsonGreenhouse Watchman | Greenhouse Watchman |
 Victor BrooksPoiret | Poiret |
| CChris AdcockTrain Passenger (uncredited) | Train Passenger (uncredited) |
| MMichael BishopFlight 356 Pilot (uncredited) | Flight 356 Pilot (uncredited) |
| EErnest BlythSS Midland Passenger (uncredited) | SS Midland Passenger (uncredited) |
 Jim BradyEscaped Prisoner (uncredited) | Escaped Prisoner (uncredited) |
| JJimmy ChartersBlind Man at Station (uncredited) | Blind Man at Station (uncredited) |
| MMick DillonTriffid (uncredited) | Triffid (uncredited) |
 Katya DouglasMary (uncredited) | Mary (uncredited) |
 Peter DyneleyNarrator / Parisian Radio Operator (voice) (uncredited) | Narrator / Parisian Radio Operator (voice) (uncredited) |
| MMabel EtheringtonBlind Woman (uncredited) | Blind Woman (uncredited) |
| TThomas GallagherBurly Man (uncredited) | Burly Man (uncredited) |
| MMuriel GreensladeSS Midland Passenger (uncredited) | SS Midland Passenger (uncredited) |
| GGeorge HilsdonMan in Train Station (uncredited) | Man in Train Station (uncredited) |
| GGerry JudgeTrain Passenger (uncredited) | Train Passenger (uncredited) |
| FFrederick KelseyTrain Crash Survivor (uncredited) | Train Crash Survivor (uncredited) |
