This season is a bit funny. As it seems to be suggesting there are mass causality/civilization ending events every hour on the hour, that require time travel intervention.
Earlier seasons had a couple mass causality events, but was mostly just saving the occasional "important person".
Also, ep 10. lol.
"why dont you contact someone and tell them?" "who would be believe us?" uh... I don't know, how about FBI director, and us government, which is now "working" with you already at this point? I mean, it apparently was pretty easy to convince them, with future knowledge, healing a kid with cancer, also talking to an emergent A.I, also, by showing future math to demonstrate a flaw in a power gen model...
"people in power would try to use our tech for their own ends" uh.. again, us government already does know about you. And now you mention it, just one fbi liaison, and absolutely no one else spying on you, or trying to work with you to get your tech, or make use of your tech IS a bit odd.. or, you're just wrong because, they know about you, and AREN'T doing what you just said..