Also known as: Adult-onset Still's disease
This is the central medical mystery of the episode. Suzanne presents with rare autoimmune disease causing flu-like symptoms, fatigue, and eventually macrophage activation syndrome (MAS) where her white cells attack other blood cells. DeLuca obsessively pursues the diagnosis across multiple days without sleep, ultimately saving her life with high-dose steroids in a dramatic moment that drives the episode's main conflict.
Also known as: MAS
Life-threatening complication of Still's disease where Suzanne's white blood cells begin consuming her other blood cells, causing her platelet count to drop from 250 to 5 and resulting in bleeding from her mouth. This complication creates the episode's climactic medical emergency.
Also known as: Bear mauling injuries
Scott sustains multiple chest lacerations, hemothorax, and complete nasal avulsion when attacked by a bear while protecting his wife. His nose is temporarily grafted into his forearm. He later dies from hemorrhagic shock due to bleeding into his chest cavity, creating emotional weight for the episode's relationship themes.
Also known as: Blood in chest cavity
Scott develops bleeding into his chest cavity from the bear attack. The chest tube drains 400 ccs of blood before he experiences catastrophic rebleeding leading to V-fib and death despite emergency thoracotomy attempts.
Also known as: Nose torn off
The bear completely avulses Scott's nose. Surgeons temporarily graft it into his forearm using the radial artery to maintain viability until facial wounds heal enough for reattachment. This unusual procedure is a memorable visual element of the episode.
Also known as: Arm artery injury
Rachel's brachial artery is severed during the bear attack. The artery is repaired surgically but she develops median nerve weakness, requiring washout surgery to prevent infection. Her physical recovery contrasts with her emotional turmoil over her affair.
Also known as: Nerve damage in hand
Following the brachial artery repair, Rachel exhibits weakness in median nerve distribution, requiring monitoring and surgical washout to prevent infection while she recovers from the bear attack.
Joey, a homeless pediatric patient, has limited shoulder range of motion (abduction to only 45 degrees) requiring intensive physical therapy. His emotional trauma from family separation interferes with his recovery, leading doctors to reunite him with his siblings to motivate his rehabilitation.
Also known as: Manic depression
The episode strongly suggests DeLuca is experiencing a manic episode, mirroring his father's bipolar disorder. His sister Carina expresses concern about family history, noting his extreme highs and lows, impulsive decisions, lack of sleep/eating, and obsessive behavior. While he successfully diagnoses Suzanne, his behavior throughout raises serious mental health concerns that will become a major character arc.
Also known as: Depression
Richard admits to feeling 'bone tired' following his divorce from Catherine. Bailey identifies his symptoms as consistent with depression. He struggles to find meaning in teaching his new residents and feels defeated, representing an ongoing character health concern.