On Episode 10, Season 1.
-Clarke recognizing someone as septic, and saying the solution is... transfusion of some random person's blood? Because sepsis is "dirty blood"? I know, I know, TV medicine, but that's just dumb.
-Clarke feigning innocence and then SLITTING HER CAPTOR'S THROAT with not a fuck given? Then looking him in the eyes as he blleds out and tells him "There, there, just go to sleep"? Bad ass.