CW DC Synopses November 13-16

Here are the descriptions for the sixth episodes of the new Arrowverse seasons.

Supergirl "Midvale"

ESCAPE DOWN MEMORY LANE — Kara (Melissa Benoist) and Alex (Chyler Leigh) head home to Midvale for a little R&R. While there, Kara recalls a painful memory of a childhood friend’s death and how that traumatic experience brought the Danvers sisters closer together. Izabela Vidovic plays Young Kara and Olivia Nikkanen plays Young Alex in flashbacks. Rob Greenlea directed the episode written by Caitlin Parrish and Jess Kardos (#306). Original airdate 11/13/2017.

The Flash "When Harry Met Harry"

ONE HARRY, TWO HARRYS, THREE HARRYS, FOUR — When collectors of Native American artifacts are attacked by a meta named Mina Chayton (guest star Chelsea Kurtz) who can bring inanimate objects to life, Barry (Grant Gustin) turns to a surprising ally for help. Determined to crack the identity of The Thinker, Harry (Tom Cavanagh) enlists Cisco’s (Carlos Valdes) help to summon the ultimate think tank: “The Council of Wells’,” a roundtable of the brightest Harrison Wells’ from various Earths. Brent Crowell directed the episode written by Jonathan Butler & Gabriel Garza (#406). Original airdate 11/14/2017.

Legends of Tomorrow "Helen Hunt"

A DIFFERENT KIND OF WAR — When the Legends track down an anachronism in 1930s Hollywood, they discover it’s none other than a time-displaced Helen of Troy and she’s just started a war between two film studios. As the Legends try to fix history and return Helen (guest star Bar Paly) to the Bronze Age, things get complicated when they are blindsided by the appearance of a former enemy. Sara (Caity Lotz) contemplates an offer she is made, which would make the Legends leave the anachronisms be. Meanwhile, Stein (Victor Garber) and Jax (Franz Drameh) find themselves in an unusual predicament. Dominic Purcell, Brandon Routh, Nick Zano, Maisie Richardson-Sellers and Tala Ashe also star. David Geddes directed the episode written by Keto Shimizu & Ubah Mohamed (#306). Original airdate 11/14/2017.

Arrow "Promises Kept"

OLIVER MAKES A BIG DECISION — As Slade (guest star Manu Bennett) continues to uncover clues about his son’s last few years, Oliver (Stephen Amell) makes a big decision. Meanwhile, the Green Arrow (David Ramsey) leads the team into battle against “The Dragon,” a villain who is stealing valuable tech in Star City. Antonio Negret directed the episode written by Oscar Balderrama & Rebecca Bellotto (#606). Original airdate 11/16/2017.