Board Thread:The Flash discussions/@comment-9346948-20160525000159/@comment-25322628-20160605031730

Try looking at Rogue Time. Since Barry went back an entire day and knew what was going to happen before it could happen, he changed the entire outcome, allowing for other factors to occur.

Or the second season of the original Witchblade, which takes us back to the scenes used in the TNT film. Instead of going to the theater like she did in the film, Sara decided not to, resulting in her fellow detective not dying and becoming a ghost.