After a strong debut last week, the second episode of Supergirl’s inaugural season took a bit of a ratings hit, losing 30% of the audience that tuned in for the premiere. And that’s too bad because those people who decided not to come back missed a really strong follow-up episode and a better indication of what kind of show Supergirl will be. Still, nine million viewers is nothing to sneeze at. To put those numbers in perspective, The Flash and Arrow get a total of about six million viewers a week. Combined.