Marvel's Agent Carter
Hayley Atwell stars as the title character in a comic book adaption set in 1946. It tells the tale of Peggy Carter and her missions for Howard Stark, all while adjusting to losing the love of her life.

If the one by Shonda Rhimes lasts a full season, it will only be because Ms. Rhimes signed a guaranteed contract for a full year of episodes. Otherwise, I expect ALL of these shows to be cancelled shortly after the pilot airs.