Prior to having her mind wiped, Echo was a college activist named Caroline Farrell who attempted to expose the Rossum Corporation.
Prior to the Dollhouse, Victor seems to be a baseball fan, as he is able to recite the entire New York Mets line-up in "Needs".
They later escape and solidify their alliance with Adelle DeWitt, Boyd Langton, Paul Ballard and Topher Brink against Rossum's ambitions.
To accommodate the loss of their existing physician and to not let the damaged Doll go to waste, Topher created the identity Claire Saunders for Whiskey.
Later in the episode, she fatally shoots Bennett Halverson then calmly walks away, leaving the Dollhouse and causing Ballard and Echo to conclude that Rossum imprinted her as a sleeper active.
November (Miracle Laurie), whose real name is Madeline Costley, is originally introduced to the series as Mellie, the neighbor, romantic interest, and confidante of Paul Ballard.
In Omega, November's original persona and memories are restored and she is released from her contract early with full payment at the request of Paul Ballard, in exchange for him joining the Dollhouse's staff; she returns to her life as Madeline Costley, in which she had a deceased daughter named Katie.
Later on November is rescued by Paul when he and Victor invade the D.C. Dollhouse in order to kidnap Bennet who is supposed to help them reconstruct Caroline's wedge.
She and Paul manage to cause a lot of damage to Rossum's computer systems before Boyd plays a tape of Adelle activating Mellie's sleeper programing.
Once she realizes what a threat she poses to Paul, and that she cannot retain control of her body she commits suicide, sacrificing herself in order to save him, confessing that he made her feel like "a real person".
In the second season, Alpha returns, killing all who ever hired Echo as a serious romantic partner, save for one: Internet billionaire Joel Miner.
One year later, during the events of Epitaph Two: Return, Alpha is revealed to be running a revived Dollhouse for "dumbshows", or those who were wiped and not given a replacement personality by Rossum.
He later leaves the safety of the Dollhouse for fear that he may return to his original unstable personality and be a danger to the others, although Echo finds this unlikely, believing him to be "evolved" like herself.
Kilo (Maurissa Tancharoen) is a female Active brought in by Topher in the episode "The Public Eye" to demonstrate the effects of the "Disruptor".
She eventually is imprinted with the personality of a cabaret dancer, causing Caroline to go back into the Dollhouse in order to save the Actives from what she sees as a form of prostitution and slavery.
Prior to working in the Dollhouse, her job entailed growing human organs out of stem cells at a lab in her native England and later in Los Angeles.
Although Adelle is the head of her "House", she does answer to off-screen superiors, as the L.A. Dollhouse is just one of more than twenty worldwide with their headquarters in Tucson, Arizona.E-6 She is revealed to be "Miss Lonelyhearts" who has hired out Victor several times for romantic encounters to quell her intense loneliness.
Another flashback shows her living in the Dollhouse, with the other Actives (who have been restored with their original personalities) and has developed a profound bond with Topher, who has gone insane with guilt over the chaos the imprinting technology caused.
In a future scene in "Epitaph One" (later shown in context in "Getting Closer"), it is revealed that Boyd is in a romantic relationship with Claire Saunders, and must leave the Dollhouse in a hurry, though promises to come back for her.
On his birthday, Topher is able to use an Active to goof off with in order to celebrate under the guise of an "anterior insular cortex diagnostic" – an indulgence Adelle allows him once a year.
[2] Flashbacks in "Epitaph One" show that Dr. Saunders became romantically involved with Boyd Langton - a scene later shown in "Getting Closer" - and following the technological apocalypse and Topher's breakdown, acts as the Dollhouse's programmer.
Laurence Dominic (Reed Diamond),[3] head of security at the Dollhouse during most of the first season, takes his job very seriously, but doesn't think very highly of the Dolls themselves, viewing them more as robots than humans.
Being convinced to join Echo, he frees Priya and Anthony, and ultimately traps Arcane, who is in fact Clyde; a founder of Rossum.
However, during the next episode, Dominic frees himself from the attic, and works his way down to the corridors where Echo is allowing Anthony and Priya to leave the house, and warns her that Clyde is dead and Rossum is onto their plans.
In "Epitaph One", Dominic is shown to have been recently released from the Attic with his memory restored, shortly after imprinting technology starts being used as a weapon.
Joe Hearn is introduced as a less dedicated counterpart to Boyd Langton, and strongly dislikes Echo for her individualism and worries about her influence on Sierra.
Graham Tanaka (Mark Sheppard) is an FBI agent highly critical of Ballard's assignment of the Dollhouse, believing it to be nothing more than an urban legend.
Mag (Felicia Day) (short for Maggie) is the leader of a ragtag group who calls themselves the "actuals", people who still have not been imprinted and retain their original personalities.
In the year 2019, she leads a small group of "actuals" underground to the remains of the Los Angeles Dollhouse where they may find a cure to the memory imprinting across the world.
Inside the remains of the Dollhouse, Iris begins killing off the survivors with the intention to leave the girl's body and find safe haven for herself.