Lightman infiltrates a group of bank robbers to prevent the actual robbery from succesfully taking place.
Lightman defends a wrongly accused man from an increasingly hostile mob. In the process of exonerating him, Lightman uncovers a dark secret that helps a damaged mother and her daughter begin the healing process.
The Lightman Group is hired to examine police profiling techniques in the wake of an incident involving Wallowski, and Internal Affairs attempts to leverage Lightman's relationship with Wallowski to get him to incriminate her.
Songs: The Black Keys -- These Days
An art museum hires the Lightman group to determine wheter their personnel is trustworthy because of an upcoming major exhibition.
Torres feels bad when a robbery attempt is made on the museum, which she didn't anticipate. Lightman meets a beautiful woman who turns out to be playing him to distract him and get what she wants.
When a mining incident occurs, The Lightman Group is hired to find out if it really was an accident or if it was intentional. Lightman goes underground to see if the miners are hiding anything about the incident.
Meanwhile, Foster is clearing Lightman's name with the FBI, who discovered that Lightman has been participating in underground poker games.
Lightman goes head-to-head with the leader of a self-help empire to free a wealthy woman who may be under the control of the cult-like leader. When Lightman begins to investigate, things get personal as he suspects the group of threatening him and his daughter, Emily.
A woman with early Alzheimers' is hit by Lightmans' car while Emily is driving and texting at the same time. The woman seems to be confused. Emily calls Cal to assist her. The woman seems to believe that people close to her have all been killed by a man called Charlie. Lightman further investigates what's going on.
Songs: (Unknown artist) -- Waters of March
After a young girl gets shot during the robbery of the diner, Lightman and Foster think that it was no accident, but premeditated. Since it was a family restaurant, they investigate the family. The current owner is dying of cancer and his will regarding the restaurant ownership strikes Lightman as a motive for the murder.
Lightman is called to a mental hospital to determine if a patient is being held against his will. Attempting to have the patient released, Lightman finds himself descending down a path that forces him to question his own sanity and brings him face-to-face with his own past.
Lightman is hired by a wealthy woman to do a background check on her new boyfriend, so he digs deep into the man's past to find out the truth about this social chameleon.
Lightman is hired to investigate three high school students responsible for a fatal traffic accident, which takes a turn for the better when he finds the heroic paramedic who was first on the scene.
When a baby abduction is mentioned on the news, Lightman and Foster study the faces of the parents. Lightman thinks that there is foul play from one of them. They dig further into the case to help out with the police investigation of the abduction.
Foster's former patient, one of the founders of a social-networking app, comes to the Lightman Group when she thinks she's being squeezed out by her partner. When she turns up dead a short time later, Lightman fights against the prevailing evidence to expose the truth behind the murder.