Cloudbase is the operational headquarters of international security organisation Spectrum, from Captain Scarlet And The Mysterons. In the New Captain Scarlet series, it is called Skybase.


Cloudbase behind the scenes

Originally conceived as a security organisation, Spectrum needed an HQ that could be top-secret yet easily accessible to its operatives. Early designs for a submarine, a space station, a floating island, and a Saharan complex were rejected. Ultimately, plans were approved for an aircraft carrier-like structure that was able to float on the edge of Earth's atmosphere using a combination of turbo fans and newly-developed anti-gravity




Cloudbase hovers in the troposphere at a height of 40,000 feet and can be moved above any point on Earth as needed. Due to its altitude, the entire structure is pressurized; pilots entering or leaving aircraft on the flight deck, do so inside airtight capsules.


Cloudbase is built from fleetonium alloy at an unnamed world government research depot in Stockholm, Sweden. It was made into fifty separate sections prefabricated and assembled in outer space, supervised by Colonel Conrad Turner of WSP from an abandoned satellite.


Cloudbase is 630 feet long and 330 foot wide, from where the 593 person crew of field agents (the Captains), pilots, medical, administrative and maintenance staff operate. It has a flight deck, control room sleeping facilities etc, just like an aircraft carrier.

Power Supply

In the Generator Room is a vast complex of more than 20 Cahelium engines working on the unique task of converting the sun's rays into energy. The engines provide enough power to enable Cloudbase to be held aloft by it's 4 vertical-thrust, air-ducting, hover "combines" (producing 500 tons per square centimeter, 2,688,000 Lbs PSO thrust). It also has horizontal thrusters able to propel it to any point around the world in a matter of hours. These atomic jets are powered by air-intake, nacelle located, nuclear-powered, cloud-vapor conversion jets.


The Captains, Angels and some administration staff (such as Colonel White and Lieutenant Green) usually work on a four hours on call/four hours off basis, with four hours on/two off in emergencies.

Control Room'

In the hyperactive Control Room are; Colonel White's control desk, itself a vast computer and Lieutenant Green's communications console. From his desk the Colonel is able to contact all the world's companies, any individuals, Spectrum's auxiliary forces and world government groups. From his communications console, with its own color-coded chart, the Lieutenant is able to help decipher Mysteron threats, and use this communications console to record, file and recall for further use vast amounts of information necessary for the maintenance of Cloudbase it'self.

Observation Room

Adjacent to this main Control Room is a short, curved, tunnel-like gallery. This observation tube is constructed from some clear a giving all-round clear visibility of the area surrounding Cloudbase. From all over the world information is radioed automatically through Cloudbase telecommunications systems in the Observations Room (or various worldwide Spectrum Information Centres), where it is identified, sorted, gauged on importance values, and passed on for storage. The observation room houses the Spectragram, the video-scanners, astroscopes, space-mascope. From this room, at the flick of a switch, any part of Earth can be scanned through observation satellites scattered above the Earth . The Spectragram is the radar defence of Cloudbase. Registering any object coming within a 500-miles radius of Cloudbase.


All members of Spectrum personnel (Captains, Angels, security officers, etc) are connected to Cloudbase by their radio-transceivers, linking them with the communications network of Lieutenant Green's desk. Every member of staff must make at least two daily reports to Lieutenant Green.

Other information is also relayed through to Colonel White and Lieutenant Green through Spectrum's communications section and the Spectrum Information Centers. Every major city on Earth, barring Bereznik, has some form of Information bureau (a Spectrum Information Centre or otherwise), linking them with Cloudbase.

Medical Bay

The medical bay, the size of a small hospital, is manned by Doctor Fawn staff. It includes an isolation ward and operating theater and many other facilities.

Other Rooms

Radar Room, for tracking aircraft, rockets and missiles; Colonel Whites Conference Room for important meetings; Room of Sleep for crew rest; Amber Room, where pilots (all female), stand by for action; Lounge, for all Cloudbase crew to relax between shifts.


Various types of aircraft are carried by Cloudbase. Among them are, Spectrum Passenger Jets, Magnocopters using the lower flight deck; [Interceptor fighters]] which are launched from the upper flight deck. the Interceptors are maintained below the flight deck.


Cloudbase's primary defense is the squadron of Angel Interceptor fighter aircraft. At least one fighter is in the air at all times, while the other two are kept on permanent standby; electron ray discharge air-to-air missiles; hypersonic paralyzing cannons.


Cloudbase was a six-foot model designed by Derek Meddings, filmed in front of a painted sky backdrop. Too heavy to be supported by wires, the model was held in the air by metal supports, which were concealed behind it.


Captain Scarlet and the Mysterons
CaptainScarlet Logo

Spectrum: Captain Scarlet | Captain Blue | Colonel White | Lieutenant Green | Destiny Angel | Captain Black | Symphony Angel | Captain Brown | Rhapsody Angel | Captain Grey | Melody Angel | Captain Ochre | Harmony Angel | Captain Magenta | Doctor Fawn | Captain Indigo | Spectrum Guards
Others: The Mysterons | World President Younger | Lieutenant Dean | Navigator Conway | Director-General Xian Yoh | Delta Garage Attendant | DT19 Pilot | DT19 Co-Pilot | Airport Chief | Airport Operator | Director-General Impersonator | Spectrum Agent 042 | Assassin | Macey | 1st London Police Officer | 2nd London Police Officer | 3rd London Police Officer | 4th London Police Officer | 5th London Police Officer | 6th London Police Officer | Woman Driver | Harris (Manhunt) | Security Chief Richards | Geiger Operator | Delta Garage Mechanic | Culver Guard 1 | Culver Guard 2 | General Ward | Eddie | Sergeant Marshall | Lieutenant Burroughs | Trapper | Red Deer Sentry Joe | Cariboo Sentry | Big Bear Sentry | Dead Body | Bob Lynn | TVR-17 Controller | Helijet Pilot | USS Panther II Captain | Lieutenant Belmont | Soames | Davidson | Clark | Commodore Goddard | Captain Holt | Morton | Distillery Attendant | Dr. Theodore Magnus | General Tiempo | Dr. Turner | 1st Medical Student | 2nd Medical Student | Porter Benson | Radiographer | Nurse (Operation Time) | Morgan | Doctor (Operation Time) | General Peterson | Doctor Giadello | 1st Warden (Post 14) | 2nd Warden (Post 28) | Mason | Steele | Kramer | Dice Club Croupier | Barman | Nuclear City Security Chief | Attendant Delta garage | Kruger | Doig | Carl | Fire Warden | Lunar Controller | Orson | S.I.D | Shuttle Pilot | Supreme Commander of Earth Forces | Colonel Storm | Major Brooks | General Cope | Captain Hassel | Pete | MCA Tanker Driver's Mate | Arab | Andre Verdain | Helga | Gabrielle | Casino commissionaire | Model | Fairfield | Jackson | Fire Chief | Major Stone | Joe Johnson | Phil Machin | Major Reeves | Linda Nolan | Frazer | Shroeder | Doctor Breck | Doctor Carter | Doctor Angelini | Doctor Kurnitz | Doctor Kurnitz' Secretary | Kinley | Charlie Hansen | Jason Smith | Major Gravener | Doctor Baxter | Doctor Mitchell | Nurse (Treble Cross) | Harris (Treble Cross) | Doctor Ernst Conrad | Bill Williams | Newspaper Reporter | Joe (Flight 104) | Doctor Denton | Judith Chapman | Airport Mechanic | General Rebus | Neilson | Rhoades | Captain (Expo 2068) | Doctor Sommers | Driver (Expo 2068) | Seneca Pilot | Lumberjack (Expo 2068) | Raynor | Mervin Brand | President Roberts | Vice President | Vice-president's Wife | Professor Gabriel Carney | President Conrad Olafson | President John L. Henderson | SKR4 Captain | SKR4 Navigator | Major Moran | Sergeant (Inferno) | Commander Williams | Maxwell Airbase Sergeant | Colgan | Mysteron Agent (The Inquisition)

TV Series Episodes:
The Mysterons | Winged Assassin | Big Ben Strikes Again | Manhunt | Avalanche | White as Snow | The Trap | Operation Time | Spectrum Strikes Back | Special Assignment | The Heart Of New York | Lunarville 7 | Point 783 | Model Spy | Seek and Destroy | Traitor | Renegade Rocket | Crater 101 | Shadow Of Fear | Dangerous Rendezvous | Fire at Rig 15 | Treble Cross | Flight 104 | Place of Angels | Noose of Ice | Expo 2068 | The Launching | Codename Europa | Inferno | Flight to Atlantica | Attack on Cloudbase | The Inquisition

Audio Adventures:
Introducing Captain Scarlet | Captain Scarlet and the Mysterons | Captain Scarlet is Indestructible | Captain Scarlet vs. Captain Black

Young Corgi | The Vault

Cloudbase | Maximum Security Building

Vehicles and Craft:
Spectrum Saloon Vehicle | Spectrum Pursuit Vehicle | Maximum Security Vehicle | Angel Interceptor | Spectrum Passenger Jet | Spectrum Helicopter | Spectrum Hovercraft | Spectrum Radar Van | Magnacopter | Zero-X

Community content is available under CC-BY-SA unless otherwise noted.