Greg Pratt

Greg Pratt
Mekhi Phifer as Greg Pratt
First appearance	April 4, 2002 (8x18, "Orion in the Sky")
Last appearance	September 25, 2008 (15x01, "Life After Death")
Portrayed by	Mekhi Phifer
Information
Gender	Male
Occupation	Physician
Title	Medical Student (2002) Intern (2002-2003) Resident (2003-2006) Attending (2006-2008)
Family	Charles "Charlie" Pratt Sr. (father) Charles "Chaz" Pratt Jr. (paternal half-brother) Evelyn Pratt (stepmother) Jocelyn Pratt (paternal half-sister)

Dr. Gregory "Greg" Pratt is a fictional character on the United States television show ER, portrayed by Mekhi Phifer from April 4, 2002 to September 25, 2008. Mekhi Phifer was removed from the main cast opening credits in the 2nd episode of season 15.

Pratt's first appearance as a main character was late in Season 8 in the episode "Orion in the Sky" (2002), as a smart but arrogant intern from VA hospital. He meets Dr. Mark Greene on Greene's last day at County and is initially dismissive of him, before becoming more measured when he learns of Mark's terminal cancer, and by day's end he has learned a little about practicing medicine from Dr. Greene. Dr. Pratt wasn't present at Dr. Mark Greene's funeral but in flashback episode in Season 12 "Body & Soul", it revealed Dr. Pratt worked that day at the hospital since it was understaffed with most of the doctors at Dr. Greene's memorial. Pratt later inherits Dr. Greene's locker.

In the beginning of his residency, Pratt shows immediate leadership and quick precision. But his limited experience and cowboy antics often led Pratt to collide with his chief resident Dr. John Carter and other attendings over many occasions, including a procedure he was unqualified to do (though the patient survived) and resuscitating a patient who had been declared dead, and was brain-dead upon his "revival". He initially clashed with med student Michael Gallant as Michael's military background made him more by-the-book whereas Pratt liked to go around the rules, but they later became close friends. During the critical smallpox outbreak, Pratt proved his skills and courage as a swift physician by helping Dr. Luka Kovač and Dr. Jing-Mei Chen save Dr. Romano's life. The entire hospital is thrown into chaos during the evacuation gone awry, and he along with Dr. John Carter, Abby Lockhart, and Dr. Jing-Mei "Deb" Chen were forced into quarantine in the ER.

In Season 9, Pratt begins an off/on relationship with fellow physician, Dr. Jing-Mei "Deb" Chen. During the series, it was revealed that Pratt had a mentally handicapped adopted brother named Leon living with him, a man who kept Pratt safe and focused on school during his childhood but was left with the reasoning ability of a small child after surviving a gunshot to the head. Due to his handicap, Leon often got into trouble and would disrupt Pratt's professional and personal life, especially when he became involved with a group of thugs who stabbed him in the buttock over a confiscated gun, got him thrown in jail overnight, and then made him join them on a robbery that ended with one of the thugs dead and a cop badly injured (though he recovered thanks to good surgical work by Dr. Elizabeth Corday). To help give Pratt a break, Carter suggested that Leon leave town for a while, leading Pratt to send his brother away to stay with other family members in Baltimore. Leon never returned to the show and was not mentioned again in future seasons. Pratt and medical student Michael Gallant were briefly held for questioning by the Chicago police after a robbery/homicide occurred at a diner across the street; Chen had said that she might have seen a black man fleeing the scene.