Since Maym Bialik’s return to acting, it's hard to nail down her biggest role: her portrayal of Amy Farrah Fowler for nine seasons of "The Big Bang Theory," her starring role on the Fox sitcom "Call Me Kat," or her gig as one of the hosts of "Jeopardy!". However, Bialik found one part of her job on "The Big Bang Theory" to be particularly challenging.