The Flash (Barry Allen) deals with the aftermath of traveling back in time. He must stop Captain Cold and Heat Wave, who have returned to Central City with a new ally—Cold's sister, Lisa Snart (Golden Glider). Original Air Date: March 24, 2015. Where to watch officially:

If you are having trouble with a specific download link, you can find the episode on these platforms: Most regions carry the full series.

Available for free streaming in the US (with ads).