Cisco and Wells must convince Killer Frost to lead them to Zoom’s lair on Earth-2 in the hopes of rescuing Barry, who finds himself imprisoned with Jesse and a masked stranger. Back on Earth-1, Caitlyn tries to perfect the Velocity formula so that Jay can stop the Geomancer.

U.S. air dates are in MM.DD.YY form. U.K. air dates are in DD.MM.YY form.

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THE EXCITING CONCLUSION TO THE EARTH-2 JOURNEY

On Earth-2, the team races to find Zoom's lair and asks for help from the most unexpected source. Meanwhile, back on Earth-1, Caitlin (Danielle Panabaker) rushes to perfect Velocity-9 so that Jay (guest star Teddy Sears) can stop the Geomancer (guest star Adam Stafford).

J.J. Makaro directed the episode with story by Todd Helbing & Aaron Helbing and teleplay by David Kob (#214).