Rogue Time

"Rogue Time" is the sixteenth episode of the first season of The Flash and the sixteenth episode overall.

Synopsis
The Flash learns that Captain Cold and Heat Wave have returned to Central City. This time Snart has brought along his younger sister Lisa to help wreak havoc on the city.

Trivia

 * As a result of Barry's actions in the previous episode, the timeline that was present has been undone by changing the events.