Part 3 of the 3-part "History Lesson!" It's Viking action just the way your parents described it! As the raging hordes close in on Canary and her unlikely allies, the Ravens, Oracle tries desperately to pierce the misty veil of time to contact her missing colleague. But if she succeeds, then not only will Canary be saved, but Cheshire will return to the present as well, where she'll murder several helpless S.T.A.R. Labs employees! Either way, Canary can't win!