Split personality

Split personality
Niki sees her alter-ego at the Montecito Casino
First reference:	Genesis
"Split personality" on Wikipedia

Dissociative Identity Disorder, also called 'Split Personality Disorder' and previously referred to as Multiple Personality Disorder, is a condition that Niki Sanders exhibits which results in one of two different alters asserting itself at a given time. Niki's alternate personality is named Jessica.

About

Genesis

Niki talks to Micah's principal about Micah's tuition. She sees her reflection in a fish tank moving differently than she is and yells at it to "leave me alone". When she drops Micah off at her friend Tina's house, she tells her that she sometimes sees and hears a strange "other" person, but Tina fails to understand. Her reflection appears to be "delayed".

Later, Linderman's thugs break into her house and demand the money she borrowed from Mr. Linderman. She attempts to escape, but fails. The thugs suggest she performs for them on camera. She refuses, and they strike her. Sometime later, she awakens to find the bodies of the thugs mutilated. She looks into a mirror and finds that her reflection is covered in blood when she is not, and is gesturing for her to keep quiet.

Don't Look Back

Niki discovers that her alter ego has put the bodies of the thugs in the trunk of a Cadillac, along with a map.

Collision

Niki is assaulted by Linderman's henchman, and switches to her alter-ego. Her alter-ego beats the thug up, calls Micah "our son", and goes to Nathan's hotel room to sleep with him.

Better Halves

Niki has a full conversation with Jessica, who reveals much of Niki's unaccounted-for time. Jessica asserts herself as a protector and as being the one "strong enough" to take care of Niki and Micah. Jessica convinces Niki that D.L. will take Micah, and that Niki should take action. As Niki retrieves the money, D.L. catches her. Niki tries to explain, but Jessica takes over and beats D.L. up.

Nothing to Hide

Niki regains consciousness on the floor of her bedroom to find D.L. and Micah gone, along with the money. Tina comes over, and Niki explains that she has an alter-ego named Jessica. Tina tries to tells her that Jessica isn't real; Jessica takes over and tells Tina to leave.

Homecoming

Jessica tries her rifle and sets out to find D.L. and Micah, as Niki watches helplessly from a van's side-view mirror.

Six Months Ago

Jessica visits Hal's hotel room and tells him how he abused Niki's sister to the point of accidentally killing her. She bloodies his nose and stuffs the check he gave Niki in his mouth tells Hal to never come back, and then leaves.

Fallout

Jessica, having shot D.L., catches Niki's pleading reflection in the car's window, but dismisses her, slamming the car door so forcefully the glass shatters. As she searches for her son and husband, she sees her reflection in a puddle and Niki argues with her. Both are alerted by Micah's screams, and go to find him. D.L. and Jessica have an altercation, injuring Micah in the process. Realizing that her alter ego is out of control, Niki takes over again, and turns herself in to the authorities.

Godsend

Niki meets with her attorney in prison. Niki and Jessica keep alternately asserting themselves while having an argument over how to handle their trial. The attorney remarks that multiple personality disorder is hard to sell to a jury. Jessica tells him to get them a shrink; Niki tries to dissuade him.