Earth-based organisations

• Al-Qa'ida
• 
  Alex Hopkins' team
• Category:Alien defence organisations
• Alliance (Original Sin)
• American Federation of Musicians
• Artificial Light Studios
• The Association

• Basque army
• Branson Inheritance
• 
  British Army
• Category:British organisations
• British Secret Service
• Brotherhood of the New Dawn
• Bundeswehr

• Canadian Space Agency
• 
  Central Military Commission
• A Charitable Earth
• Chinese army
• Cobalt Corporation
• Collection Squad
• Conglomerate
• Special Congress

• Children of Destiny
• Disaster Recovery Committee
• DOCTO(R)

• Earth Alliance
• Earth Command
• 
  Earth Empire
• Earth Reptile Council
• Category:Earth-based institutions
• European Secret Service
• Eurozone Space Agency

• FBI
• The Fellowship
• Filipino Army
• First Great and Bountiful Human Empire
• Fourth Great and Bountiful Human Empire
• French Resistance

• G8
• German Army
• Grand Families
• GSO

• IDEA
• Imperial Army Air Fleet
• Imperial Japanese Army
• Imperial Landsknechte
• Imperial Navy
• International Ice Patrol
• International Space Command

• 
  Jack Harkness' team

• Ke Le Division
• Kentucky Medical Authority
• Knights Templar
• Kodo Ha
• Ku Klux Klan

• 
  Lend-a-Hand
• Little Brothers
• Lives Not Bullets
• 
  Luftwaffe

• Magnate
• MDZ Research
• 
  Men in Black
• Military Observation of Otherworldly Occurrences
• Militia
• 
  Ministry of Defence
• Montana Republican Militia
• Mr Copper Foundation

• NATO
• 
  Nazi
• New Roman Empire
• North Sea Boating Club

• 
  Ofsted
• Order of Saint Peter
• Order of the White Peacock

• Category:P.R.O.B.E.
• Paragon Studios
• Peace Party
• Peripatetic medical squad
• Pinkerton Agency
• Planet 3

• Red Army
• Robot Flying Squad
• Roman Army
• Russian army

• Sakura Kai
• Scientific Reform Society
• 
  Scindia-Corp
• 
  Second Great and Bountiful Human Empire
• Shadow Directory
• Shining Dawn Corporation
• Somnus Foundation
• Space Command HQ
• Space Security Service
• Survey Four
• SWAT

• Terran Survey Corps
• Category:The Auctioneers
• Third Great and Bountiful Human Empire
• 
  Tong of the Black Scorpion
• Tosei Ha
• Traveller (Love and War)
• 
  Tycho Project

• U.S. Cavalry
• UN Deep Space Force Group 1
• UNASA
• Union Army
• Unispace Security
• UNISYC
• United States Air Force
• United States Marine Corps
• United States Navy
• United States Secret Service
• 
  US Army

• Veterans of the Crimea

• Wehrmacht
• World Ecology Bureau
• World Pest Control
• World State

• Yesterways LTD
• Youth Council