 Forrest TuckerAlan Brooks | Alan Brooks |
 Jennifer JayneSarah Pilgrim | Sarah Pilgrim |
 Janet MunroAnne Pilgrim | Anne Pilgrim |
 Laurence PaynePhilip Truscott | Philip Truscott |
 Warren MitchellProf. Crevett | Prof. Crevett |
 Frederick SchillerMayor Klein | Mayor Klein |
 Colin DouglasHans | Hans |
 Andrew FauldsBrett | Brett |
 Stuart SaundersDewhurst | Dewhurst |
| DDerek SydneyWilde | Wilde |
| RRichard GoldingFirst Villager | First Villager |
| GGeorge HerbertSecond Villager | Second Villager |
| JJeremy LonghurstFirst Student Climber | First Student Climber |
| AAnthony ParkerSecond Student Climber | Second Student Climber |
| LLeslie HeritageCarl | Carl |
| TTheodore WilhelmFritz | Fritz |
 Anne SharpThe Mother | The Mother |
| CCaroline GlazerThe Child | The Child |
| GGarard GreenThe Spotter Pilot | The Spotter Pilot |
| JJack TaylorVoice of Beheaded Climber Jim | Voice of Beheaded Climber Jim |
| AAnna CameronEvacuated Villager (uncredited) | Evacuated Villager (uncredited) |
| TThomas FoulkesEvacuating Villager (uncredited) | Evacuating Villager (uncredited) |
| OOtto FrieseEvacuated Villager (uncredited) | Evacuated Villager (uncredited) |
| JJack HetheringtonStationmaster (uncredited) | Stationmaster (uncredited) |
| PPhilip JohnsEvacuated Villager (uncredited) | Evacuated Villager (uncredited) |
| RReg ThomasonMountain Rescue Stretcher Bearer (uncredited) | Mountain Rescue Stretcher Bearer (uncredited) |
