He was portrayed by Dominic Rains. Crockett started out as a hard-partying southern doctor who is a skilled surgeon, but wasn't always one to follow rules. He was occasionally seen keeping a bottle of alcohol in his hospital locker, as well as liberally indulging in alcohol at parties.
He somewhat came down to earth after opening up to his co-workers about the untimely death of his young daughter Harper. He immigrated to New Orleans, Louisiana when he was two years old. His family changed their last name to Marcel because it was popular in the region they were in and changed his name to Crockett because his father was a fan of Miami Vice and named him after the character Sonny Crockett. The family spoke Farsi at home, allowing him to become fluent in it, and overtime he built up a Southern Cajun style accent fluent around the Gulf Coast.
He had a daughter named Harper who died of Leukemia shortly after her first birthday. Crockett donated bone marrow in an attempt to save her, but it was unsuccessful. Her death left a deep scar on Crockett and likely caused him to develop his cavalier attitude to life and his work, making him prone to taking risks and disinclined to form close relationships with those around him.
When Natalie Manning finds out about his daughter, he implores her to keep the knowledge to herself for fear of people looking at him differently. He confronts Phillip Davis about secretly putting an engagement ring on Natalie 's finger, which Phillip denies. Crockett counters that it was impossible for her to still have it on as it would have been removed upon her arrival in the ED. He remains suspicious, especially after talking it over with Connor, who mentions that Phillip asked for Connor's opinion on the engagement ring at an inappropriate time when his daughter was being prepped for heart surgery.
Noah finds Crockett in an ED room giving himself IV fluids as a little "pick-me-up" after being moved from the night shift to the day shift. He and Ethan run out to an ambulance that has skidded off the road a few blocks from the hospital. He and Noah treat the patient extracted from the crashed ambulance, who is diagnosed with arterial stenosis.
