The Flash, " Therefore I Am" episode synopsis:
BARRY MEETS DEVOE — Barry (Grant Gustin) comes face to face with DeVoe (guest star Neil Sandilands). Devoe’s past is revealed through flashbacks. Meanwhile, Iris (Candice Patton) puts the final touches on the wedding, which is a week away. David McWhirter directed the episode written by Eric Wallace & Thomas Pound (#407). Original airdate 11/21/2017.
DC's Legends of Tomorrow "Welcome To The Jungle" episode synopsis:
With Sara (Caity Lotz) out of commission, the team finds a new Anachronism that leads them to the jungles of Vietnam and right in the middle of the war. Ray (Brandon Routh), Amaya (Maisie Richardson-Sellers) and Zari (Tala Ashe) pose as journalists and trek through the jungle when they are lead to time-displaced Gorilla Grodd. Meanwhile, Nate (Nick Zano) and Rory (Dominic Purcell) run into someone Rory knows which give a glimpse into his past. Victor Garber and Franz Drameh also star. Mairzee Almas directed the episode written by Ray Utarnachitt & Tyron B. Carter (#307). Original airdate 11/21/2017.
The Flash airs Tuesdays at 8pm EST followed by DC's Legends of Tomorrow at 9pm EST.