Barry and the team ally with the kidnapped Captain Cold's sister, but Barry feels duped with he learns Snart is working on something with his father; Joe faces a difficult decision.

Cast: Grant Gustin, Candice Patton, Danielle Panabaker, Carlos Valdes, Tom Cavanagh, Jesse L. Martin, Victor Garber, Wentworth Miller, Teddy Sears, Michael Ironside, Malese Jow, Peyton List, Vanessa Williams, Shantel VanSanten, Warren Abbott