If you like that sort of thing, Timeless is a fairly good show. It does a pretty good job of teaching history lessons with a twist.
You can add...
Quantum Leap
7 Days
Time Tunnel
Voyagers
The Adventures of Brisco County Jr.
Select episodes of...
Star Trek
Star Trek: The Next Generation
Star trek: Deep Space Nine
Star Trek: Voyager
Stargate SG-1
The most important reason for not meeting your parents.
Back to the Future.
That's heavy Doc.
The Stephen King based mniseries is a great example of alternative history.