Kelsey Kemper

When the annual bicycle messenger race takes place in Seattle, the hospital emergency room fills with an assortment of injuries, causing the interns to compete for the most severe cases; Derek and Burke vie for the Chief Resident's position; while Derek continues to pursue Meredith romantically, a patient flirts with George.

George prepares the house for Halloween, his favorite holiday, while dealing with the stress of hiring an assembly line worker whose life is a disaster. Meanwhile, Angie helps Carmen get accepted on the cheerleading squad in an effort to help her become more popular--but Carmen's not the kind of girl Angie was in high school.