Shosanna Dreyfus & Avery Barkley
Shosanna was fully aware that Madison Valley was well into her future, and that she might not have experienced 2018 if she had not been pulled into the town. She would have been a very old woman had she managed it, and she likely wouldn't have been able to enjoy it quite as much as she was now. So when Avery knew of Hitler and what became of the dictator, she wasn't surprised. She knew most people had heard of him, if they were from Earth and past the 40s.
"I hope I succeed as well, when I return home. Someone has to kill him, right? He needed to be stopped. And why couldn't have been me, a twenty-something Jewish girl from France?"