Lightman investigates Zach Morstein, the creator of a social networking site who becomes a murder suspect when one of the co-founders ends up dead, after expressing to Gill she is being extorted by her partner.
Lightman investigates the kidnapping of a child. As he digs deeper in the investigation, he finds out the mother hides a few secrets of her own.
Lightman is hired to investigate three high school students responsible for a fatal traffic accident.
Lightman is hired by a wealthy woman to look into her new boyfriend’s background.
Lightman tries to get a patient released from a mental hospital, in the process he questions his own sanity forcing him to face his own past.
Lightman is hired by Jim, a terminally ill, owner of a successful chain of restaurants to find his daughter’s killer as his dying wish. In the process of the investigation Lightman suspects Jim’s sons may be involved in her death.
Lightman tries to help a woman with early-onset Alzheimer’s piece together her fragmented memories, but it uncovers a deadly secret.
Lightman tries to free a wealthy woman from the control of a cultlike leader.
The Canary’s Song
Lightman investigates the death of six miners in a coal mine explosion; he believes foul play may have been involved, so he puts his own life at risk to uncover the truth. Meanwhile Foster and Torres work pro bono in an FBI case.
The Lightman Group are hired to examine an art museum staff to ensure no security information gets out before a major exhibition. In the process, Lightman becomes involved in a game of cat-and-mouse with a beautiful woman.
The Lightman Group gets hired by Internal Affairs to investigate an incident that involves Det. Wallowski and it’s also hired to review the police profiling techniques.
The Royal We
Lightman tries to exonerate a falsely accused man from a hostile mob. Meanwhile, in the process, Lightman helps a mother and daughter reconcile by uncovering a secret.
In the Red
Lightman tries by all means to stop a man filled up with revenge from robbing a bank.
Black and White
The Lightman Group investigates the murder of a journalist friend of Lightman who was doing a report on exposing a corrupt politician. Meanwhile, Emily’s new interest in dating makes Cal get in a distressed situation.
Darkness and Light
The Lightman Group investigates a young woman that has gone missing. In the course of the investigation it seems she may be linked to criminal activity in the porn business.
Foster’s boyfriend, Dr. Burns is kidnapped and Lightman works with his mysterious ex-partner to find him.