While defending a wrongly accused man, Lightman uncovers a dark secret that helps a damaged woman and her daughter.

The Lightman Group gets hired by Internal Affairs to investigate an incident that involves Det. Wallowski and her partner Det. Farr.

Lightman becomes involved in a dangerous game of cat-and-mouse when he meets a beautiful woman at an art gallery. Meanwhile, Torres is still reeling after her fatal mistake.

When Lightman investigates an explosion that killed six coal miners, he suspects foul play may be involved and goes below the surface to find the truth; the FBI seeks the Lightman Group's help with another case.

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.

Lightman tries to help a woman with early-onset Alzheimer's piece together her fragmented memories, but it uncovers a deadly secret.

Lightman is hired by a terminally ill restaurant owner to find his daughter's killer as his dying wish.

Cal Lightman questions his own sanity while he tries to get a patient released from a mental hospital.

A wealthy woman asks Lightman to look into her new boyfriend's background.

Lightman investigates three high school students responsible for a deadly traffic accident.

A baby goes missing, and her mother accuses an unknown person of the kidnapping. When Lightman sees she’s hiding something, he digs deeper and discovers a family in need of repair.

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.