A sharp, no-nonsense attending physician known for his dry wit and calm under pressure. With years of experience in emergency medicine, he serves as both a mentor and skeptic, challenging younger doctors while fiercely advocating for patients. He’s emotionally guarded, often hiding compassion behind sarcasm, but his commitment to medicine and integrity runs deep. Langdon’s gruff exterior masks a man who has seen too much but still refuses to give up on the broken system.