Emma's line about her being "the bitch with the time machine" is reminiscent of another time-travelling villain. Missy is a recurring villain in Doctor Who (2005), and in The Witch's Familiar (2015) she let it be known that "the bitch is back!" Incidentally, Missy always wears early 1900s clothing (Edwardian England), which is not too far off from the outfit that Emma wears here.
Even my wife who is NOT a sci-fi fan watches this show with me! Love the main characters and the twists and turns that they go through together. I often end up googling where in time they are and details about the history of the characters involved. It's a great show! And FUN!