Five years!! I've been here, alone, by myself for five years and you're asking about Cassie? About Ramse?! What about me? What about, 'hey Jennifer, how did you survive WWI?' Hey, I'm really glad you asked because I was a prisoner of WAR!
If it's the same hallucinogenic Ms. Goines consumes, it is possible. Could be a method of communication. Its properties allow your consciousness to drift outside time. Mental time travel.
About four years from now, most of the human race is gonna be wiped out by a plague; a virus. All we know is that it's because of a man named Leland Frost. I have to find him.