After a car accident, Detective Michael Britten experiences two dueling realities, one where his wife was killed and another in which his son's life was claimed.

In one world Michael tries to reconnect with his son, while in the other he tries to understand his wife's grief; a clue in a case in one life crosses over to a case in the other, confusing Bird.

Rex is kidnapped by an escaped convict Michael arrested 10 years ago; an investigation in Michael's other reality gets in the way of an event honoring his deceased son; clues from both realities lead to Michael's sanity being questioned.

Detective Britten runs into Rex's former baby sitter, Kate, during an investigation into an alleged suicide; while working a case with Bird, Kate appears again, but this time as a suspect.

When his tracking methods are questioned, Detective Britten becomes a suspect in his own case; Hannah considers moving to Oregon to continue school; the doctors think Britten could stop his dreams by moving out of Los Angeles.

A hostage situation leads to Detective Britten unexpectedly collaborating with Dr. Lee; Bird is concerned over Britten's lack of sleep.