A strange new virus has appeared, which only attacks strains of grasses such as wheat and rice, and the world is descending into famine and chaos. Architect John, along with his family and friends, is making his way from London to his brother's farm in northern England where there will hopefully be food and safety for all of them.
| Directing | Cornel Wilde | Director |
| Writing | John Christopher | Novel |
| Writing | Sean Forestal | Writer |
| Writing | Cornel Wilde | Writer |
| Camera | H. A. R. Thomson | Director of Photography |
| Editing | Eric Boyd-Perkins | Editor |
| Production | Cornel Wilde | Producer |
| Editing | Frank Clarke | Editor |
| Art | Elliot Scott | Art Direction |
| Sound | Burnell Whibley | Music Arranger |
| Sound | Burnell Whibley | Conductor |
| Production | Sydney Streeter | Production Supervisor |
| Directing | John Stoneman | Assistant Director |
| Camera | Walter Byatt | Camera Operator |
| Directing | Kay Rawlings | Continuity |
| Crew | Terry Witherington | Special Effects |
| Sound | Cyril Swern | Sound Recordist |
| Sound | Roy Baker | Sound Editor |
| Production | Terence A. Clegg | Unit Manager |
| Costume & Make-Up | George Blackler | Makeup Artist |
| Costume & Make-Up | Biddy Chrystal | Hairstylist |
| Costume & Make-Up | Dorothy Edwards | Wardrobe Supervisor |
| Costume & Make-Up | Tony Armstrong | Costume Design |
