Zina Zaflow

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. Meanwhile, Derek and Burke compete for the chief resident position, and while Derek continues to pursue Meredith romantically, a patient flirts with George.

Jack finally comes across an object that might be a crucial discovery; Palmer questions Sherry about her involvement with a senior staff member; and Mason, without many hours to live, makes a leadership change at CTU.