| 角色 | 饰演者 | 角色介绍 |
| John Ridgefield | 拉尔夫·理查德森 | |
| Susan Garthwaite | 安·托德 | |
| Tony Garthwaite | 奈吉尔·帕特里克 | |
| Windy Williams | Jack Allen | |
| Christopher Ridgefield | 丹霍姆·艾略特 | |
| ATA officer | Donald Harron | |
| Factor | Vincent Holman | |
| Philip Peel | John Justin | |
| Fletcher | Ralph Michael | |
| Controller | Douglas Muir | |
| Controller | 莱斯利·菲利普斯 | |
| Jess Peel | Dinah Sheridan | |
| Peter Makepeace | Anthony Snell | |
| Will Sparks | Joseph Tomelty | |
| Test bed operator (as Robert Brookes Turner) | Robert Brooks Turner |
