Episode 6 of Supergirl Season 3 will be a big one for any Kara and Alex fans out there. Titled “Midvale”, the sixth episode will be a flashback-heavy one for the Danvers sisters. <P><P> However, expect young Kara and Alex to look a little different this time. Izabela Vidovic and Olivia Nikkanen will be taking over for Malina Weissman and Jordan Mazarati as Kara and Alex respectively. <P><P> According to Benoist in a recent interview, we’ll learn more about the relationship between the beloved sisters in “Midvale”. <P><P> “You’ll get to see, through the way they interact, how their relationship started when Kara first came to Earth, how it grew, how it became so close and why they’re so close nowadays.” <P><P> Expect the episode to air sometime in November!