SHADO receive a report that a former Olympic champion has disappeared from a farm in the English countryside, thinking it might be an alien abduction, Colonel Paul Foster is dispatched to track down the UFO and eliminate it.
| Actor | Role |
|---|---|
 Ed BishopCommander Ed Straker | Commander Ed Straker |
 Wanda VenthamColonnello Virginia Lake | Colonnello Virginia Lake |
 Grant TaylorGenerale James Henderson | Generale James Henderson |
 George SewellColonel Alec Freeman | Colonel Alec Freeman |
 Michael BillingtonColonel Paul Foster | Colonel Paul Foster |