The Assassination of Abraham Lincoln

Timeless
S01E02
Season 1 Episode 2

I can't believe they keep changing history in every episode. At some point the new present is going to be really different from the one they left. Maybe Lucy plays a pivotal role in history & Flynn is actually changing history in order to help her destiny come true.

I'm also surprised that the people in the new present never believe them when they return. Maybe she should put a history text book into the machine so that they have evidence of everything that has changed.

Although they had a point about saving Lincoln, doing so could mean the time travel corporation might not exist when they return. That would be awesome.

How has nothing changed for the other two guys? Is the sphere just visible to everyone? someone is going to stumble upon it.