If someone is looking for a series with simple English, which can be watched without subtitles at an upper-intermediate level, then Blindspot might be a decent choice. It’s quite clichéd and flat in terms of plot (good guys make superhuman efforts to save the world at the last moment, which in this case means a mysterious girl is involved). However, for the first “series without subtitles,” it will probably be much better than HBO and Showtime TV shows.
Hi, I'm Rauf Aliev. 