Moonbase Luna represents Earth's first Defence bulwark against the extraterrestrial threat, and is therefore one of the primary targets in attacks by UFOs. At the command of the fascinating Lieutenant Ellis, Base Luna is one of the most sophisticated facilities in SHADO, the secret organisation tasked with defending Earth from alien incursions.
| Actor | Role |
|---|---|
 Ed BishopCommander Ed Straker | Commander Ed Straker |
 George SewellColonel Alec Freeman | Colonel Alec Freeman |
 Gabrielle DrakeLieutenant Gay Ellis | Lieutenant Gay Ellis |
 Michael BillingtonColonel Paul Foster | Colonel Paul Foster |