After having been banished by Trigon to another dimension for his failure to destroy the Earth, the other members of the Five later attacked the Titans at their newly unveiled headquarters, Titans Tower, in New Teen Titans #7 (May 1981), using Silas Stone, the father of the superhero Teen Titan, Cyborg, and the Titans’ dimensional transmitter to return the apparently alive Psimon back to them. The Five were again defeated. Psimon later allied himself with the immortal dimensional traveler known as the Monitor during the seminal 1985 event known as Crisis on Infinite Earths. Feeling betrayed, the rest of the Five turned on Psimon and apparently murdered him.
In New Teen Titans #37 (December 1983) and Batman and the Outsiders #5 (December 1983), the Five turned on Light, expelling him from the group and trying to kill him, but Light escaped, and Psimon again became leader, though the Five were again defeated, this time by the Titans, Batman, and the Outsiders. The Five, later invaded S.T.A.R. Labs in Tales of the Teen Titans #56-58 (August-October 1985), freeing Jinx and Neutron, who had been imprisoned there, and taking them into their ranks, but were defeated again by the Titans, and unsuccessfully fought Superman In Adventures of Superman #430 (July 1987), this time with new members Charger and Deuce, but were dispatched by him as well.
The team disbanded shortly after Deuce and Charger’s first missions with the Five, with Mammoth and Shimmer deciding to renounce their life of crime and finding peace in a Tibetan monastery. Psimon returned from outer space, quite alive, and systematically sought revenge on his former teammates, Gizmo, Mammoth and Shimmer. Mammoth barely survived a spear rammed through his head by Psimon, but Shimmer was turned into glass and then shattered by the telepath, and seemingly perished. Psimon shrunk Gizmo down to subatomic size, but the diminative tinkerer found a way to return to normal size, but was later incarcerated, along with Mammoth and Jinx, at the metahuman prison on Alcatraz. Psimon himself was incarcerated at another such prison called the Slab, but later escaped when it was destroyed in Outsiders #6 (January 2004).
Soon after, in a storyline in Outsiders #13 -15 (August-October 2004), frequent Captain Marvel archenemy Dr. Sivana gathered Psimon, freed Mammoth, Gizmo and Jinx from prison, and was able to successfully restore Shimmer’s shattered form, returning her to life, and put the team to work for him in a scheme to short sell Lexcorp stock by having them steal its accounts from its corporate building in Metropolis, and then driving down the stock by killing all the people in the building, and destroying two other Lexcorp properties. At the latter of the two, a microchip processor factory of Lexcorp's subsidiary, Kellacor, the Five were confronted by the Outsiders. After escaping, the criminally unsophisticated Five urged Sivana to take Lexcorp's nuclear missile facility near Joshua Tree, California. When Sivana refused, Psimon asserted that they would take it anyway, and in response, Sivana killed Gizmo with a laser blast to the head, and severed relations with the remaining four, warning them that he would kill them if they ever crossed his path again. Sivana used the money he made from the scheme to purchase a tropical island off the coast of Thailand to use as his lair, but the Five were defeated in their plan to take the facility and fire a nuclear missile at Canada. Mammoth was returned to the metahuman prison on Alcatraz Island, but the other three remain at large.
Sivana sarcastically suggested after killing Gizmo that the team rename themselves to the Fearsome Four. The Fearsome Five next turn up in Villains United #5 (November 2005), wherein they are working for the Society of Supervillains. This time around, they are led by Psimon, and the three other members of the roster are Mammoth, Shimmer, and Jinx. Lex Luthor mocks them for still continuing to call themselves the Fearsome Five even though there are only four members in the team.
The Official Teen Titans Index (ICG; 1985)
The New Titans Sourcebook (Mayfair Games; 1990)
New Teen Titans #7 (May 1981)
New Teen Titans #37 (December 1983)
Batman and the Outsiders #5 (December 1983)
Tales of the Teen Titans #56-58 (August-October 1985)
Adventures of Superman #430 (July 1987)
New Titans #116-117 (December 1994 – January 1995)
Green Lantern #57 (December 1994)
Outsiders #12-15 (July – October 2004)
However, the group bears no similarities outside of its name.