Barry tries to team up with Dr. Harrison but finds out Harrison prefers working alone. The Flash fights a new meta-human. Iris researches her brother's drag racing. Dr. Harrison starts stealing Barry's speed.
Harrison, Cisco and Barry travel to Earth-2 to save Harrison's daughter. Barry assumes the role of his doppelganger, who's married to Iris. He then encounters alternate-Caitlin and alternate-Ronnie, who are Zoom's agents.