When the co-creator of a social networking application is found dead, Lightman tries to prove that her partner was the one who committed the crime.
When a baby goes missing, the mother accuses a random person of the kidnapping. Lightman investigates, only to find a family desperate for help.
Lightman investigates three students who were responsible for a fatal traffic accident, and interviews the paramedic who was first on the scene.
Lightman is hired by a wealthy woman to look into her new boyfriend's background.
Lightman is called to a mental hospital to determine if a patient is being held against his will.
A man dying of cancer is the fatal victim of an armed robbery at his barbecue restaurant, and Lightman investigates if it really was a random event.
A woman with Alzheimer's disease unlocks a painful memory from her past, and Lightman discovers a killer may be working at her health care facility.
Lightman tries to expose a self-help cult leader after a member tries committing suicide. Despite protests, the suicidal member returns to the cult.
Lightman tries to find out who was responsible for a deadly coal mine explosion. The FBI questions Foster about Lightman's gambling partners.
While vetting a museum staff for security leaks prior to an exhibition, Lightman meets a beautiful woman who engages him in a game of cat-and-mouse.
Internal Affairs tries to use Lightman's relationship with Wallowski to incriminate her when the Lightman Group examines police profiling techniques.
Cal has a case of writer's block, and the office has major personnel issues. The Lightman Group investigates abuse charges at a teen beauty pageant.
Cal joins a crew that plans to rob a bank, so he can sabotage the heist from the inside. But one of the men has a personal motive for his actions.
Testing his ties to the FBI, Lightman investigates the murder of his journalist friend, who was in the process of exposing a corrupt politician.
The Lightman Group investigates the disappearance of a young woman, which leads them to uncover a criminal element in the adult-film business.
After Foster's boyfriend, Dave Burns, is abducted, Lightman tries to track him down with the help of Burns's mysterious ex-partner.