The Darkness and the Light

"The Darkness and the Light" is the fifth episode of the second season of The Flash and the twenty-eighth episode overall. It aired on November 3, 2015. It was the first half of a two-parter.

Synopsis
Barry learns a new breacher, Dr. Light, has come through the portal and sets off to capture her. Jay tells Barry that Dr. Light was not a threat on Earth Two and that Barry can reason with her. However, during a fight with The Flash, she blinds him and drops some shocking news about Zoom. Meanwhile, Barry and Patty go out on a date.