The colloquial name for the Metropolitan Police Service, the police service responsible for law enforcement within Greater London, excluding the central core of the City of London itself.

The Scourge of the Underworld was not one person, but the name adopted by various agents funded by The Angel (Thomas Halloway) which trained its agents for acts of vigilantism. Killing known super-criminals. The previous hits were all performed by at least two agents calling themselves Scourge

Stormtroopers specially outfitted for long range recon.

Tiny clones of Scrapper (from the Newsboy Legion).

Regenerative robots who seek to destroy the 31st Century

Bitter enemies of the Shi'ar, the peaceful Scy'ar Tal seek revenge.

Aquatic animals evolved by toxic waste into intelligent superheroes

The Sea Devils are a team of conventional (non-superpowered) adventurers, in undersea adventures.

Alliance of Gods who work with Aquaman, This team is a conclave of oceanic divinities hailing from various myths and pantheons of the mortal world whom all have come to the hidden lsland of Unspoken Water as penance for their crimes of hubris and complacency towards the duty of keeping the worlds oceans in balance

Former government agent Adeline Slade established the organization, Searchers, Inc. The Teen Titan called Jericho once worked closely with his mother Searchers, Inc. provided espionage services for a number of clients.

A team using a less powerful version of the Mandroid Armor.

Police force in Transverse City.

A splinter movement from the Dry Academy who believe that knowledge can be transferred by foodstuffs.

An ancient clandestine religious cult.

Second Force, a team of powerful superheroes.

The Secret Avengers are a black ops branch of the Avengers. Assembled by Steve Rogers in the Heroic Age. The team is now a highly secret branch of S.H.I.E.L.D.

A group of heroes assembled in differant forms based on the situation. They have been led by Doctor Strange and later Doctor Druid.

The Secret Empire is a subversive organization formed by a clandestine group to take control of the U.S. government. It has had varying agents and schemes but have been beaten by several heroes over the years.

Group of criminal mad scientists operating in Metropolis.

A superhero team with a gruesome past lead by Shade, the Changing Man in the altered reality of Flashpoint.

Brought together in Villains United, a group of villains faced off against other super criminals. Now neither hero nor villain, these rogues do whatever is best for their interests.

Earth-9/Tangent's heroic version of New Earth Secret Six.

Founded by Dr. Axel Brass and Hark, they were the greatest adventurers of the early 20th century.

A society of supervillains that has, over the years, featured a number of top villains that have on numerous occasions battled the Justice League, the Secret Six and lone heroes. In pre new 52 they were formed by Darkseid to take over the world but they had other plans.

A team very very similar to Mystery Inc. They have their own TV show.

Parody team of the X-men on "Marshal Law". They are "mutants" supremacists who considers themselves the next step in evolution.

A group of teenagers and young adults with the potential to become powerful weapons against evil (or for it). Nick Fury kept a private set of names and gathered them to combat such groups as the Skrull Empire, HYDRA, HAMMER, and America itself.

Sectaurs are humanoid insects from the planet Symbion. They are divided by the heroic ones living in the Shining Realm, and the evil ones living in the Dark Domain.

Team of moronic degenerate wannabe heroes who actually helped save the day in one instance.

Alpha One's personal agency that handles the mess from his superheroic deeds. They handle the PR and clean up. They are financed by Alpha One's financing fees from his image.

Section Zero, a secret section of the UN, are a generational group of agents who are sent to explore reports of the uncanny and impossible.

A team of soldiers, genetically modified while still in the womb, to defend their planet against Thanos (Ultimate) and his Endless Resurgence empire in a galaxy, possibly a universe, far from Earth.

A group brought together by fate to find and assemble the shards of Tolometh's amulet.

The Seekers are all the decepticons warriors that have a jet transformation. They are led by Starscream and were basically the Transformer equivalent of an airforce.

Team of Negative Zone Assassins led by Ravenous, charged with capturing the Heralds of Galactus (past and present) to be brought before Annihilus (for extraction of their Power Cosmic).

Subterranean lunar inhabitants.

Selkath were a sentient aquatic species, native to the ocean-covered planet of Manaan.

Mythological aquatic creature from Irish and Scottish folklore.

Blue armored guards who served as security for both the Republic and Imperial senate.