College student Sarah Richards is alone in fearing and disliking the new teaching machines but even she does not foresee the terrifying situation that arises when her supervisor, Stephen Kershaw, re-arranges the machines to conform with revised fire regulations.
| Actor | Role |
|---|---|
 Mark EdenStephen Kershaw | Stephen Kershaw |
 Deborah WatlingSarah Richards | Sarah Richards |
| SSara AimsonFreda | Freda |
| JJohn AllisonGeoffrey Harrison | Geoffrey Harrison |
| JJohn BaskcombEric Lonsbury | Eric Lonsbury |
 Erik ChittyDr. Hammond | Dr. Hammond |
 Noel DavisDavison | Davison |
| SSusan FieldMrs. Richards | Mrs. Richards |
| KKenneth GardnierGeorge | George |
| NNadine GeorgeFlorrie | Florrie |
| RRichard HamptonChief Supt. Mailer | Chief Supt. Mailer |
| KKeith PyottGeneral Harboard | General Harboard |
 Stephen WhittakerHarold | Harold |