Also known as: GSW
Multiple victims of a mass shooting at Doc Magoo's diner are killed execution-style with gunshot wounds to the head. Three victims are pronounced dead at the scene, representing the central crime driving the episode's plot.
Also known as: Collapsed lung
Trina, the sole survivor of the Doc Magoo's shooting, presents with gunshot wounds to chest and head causing tension pneumothorax. The team performs emergency needle decompression and chest tube placement, saving her life so she can identify the suspects.
Sean, a teenage cancer patient, has his cancer return and is being discharged to home hospice care. Susan Lewis takes him on a final outing despite his mother's wishes, giving him a last meaningful experience including his first kiss with a girl named Julia.
Also known as: Brain infection
A patient who initially claims to be drunk from a Valentine's Day party five days prior presents with altered mental status. The team suspects meningitis and prepares for a lumbar puncture to confirm the diagnosis.
Also known as: Bruised heart
A police officer injured in a multi-car collision during a high-speed chase presents with chest pain and difficulty breathing. While initially thought to have a tension pneumothorax, Gallant correctly diagnoses cardiac contusion, saving him from unnecessary chest tube placement.
Also known as: Food poisoning
Twenty children from Kelton Elementary present to the ER with vomiting and diarrhea, overwhelming triage during an already stressful day following the shooting.