Zoom arrives back on Earth-1 intent on taking over Central City. Barry and Wells plan to stop Zoom but it's extremely dangerous. Unsure if he should take the risk, Barry reaches out to both fathers for advice. Meanwhile, Cisco is shocked when he senses the Earth-2 villain Rupture, who is his brother Dante's doppelgänger; and Iris decides to open up to Barry about her feelings for him.
Cast: Grant Gustin, Candice Patton, Danielle Panabaker, Carlos Valdes, Keiynan Lonsdale, Tom Cavanagh, Jesse L. Martin, Nicholas Gonzalez, Teddy Sears, John Wesley Shipp