The Flash
Season 3 Episode 21: “Cause And Effect”
Directed by David McWhirter
Written by Judalina Neira & Lauren Certo
Starring Grant Gustin, Jesse L. Martin, Danielle Panabaker, Candice Patton, Carlos Valdes, Tom Cavanagh, Keiynan Lonsdale, Tom Felton
Created by Greg Berlanti, Andrew Kreisberg, Geoff Johns
The CW
Air Date: Tuesday, May 9th, 2017, 8:00pm

Last week on The Flash, we finally got the Savitar reveal – messed up face Barry Allen (Grant Gustin). Joe pushed Cecile (Jesse L. Martin, Danielle Nicolet) away, but then fixed it, revealing all to her. Cisco and Killer Frost (Carlos Valdes, Danielle Panabaker) kept going soft on each other. The team found Tracy Brand (Anne Dudek) and told her the future. HR (Tom Cavanagh) had a crush.

Spoilers below.

The Flash
Season 2 Episode 20: “Rupture”
Directed by Armen V. Kevorkian
Written by Kai Yu Wu & Lauren Certo
Starring Grant Gustin, Jesse L. Martin, Danielle Panabaker, Candice Patton, Carlos Valdes, Tom Cavanagh
Created by Greg Berlanti, Andrew Kreisberg, Geoff Johns
The CW
Air Date: Tuesday, May 3rd, 2016, 8:00pm

Last week on The Flash, a super strong meta kidnapped Wells (Tom Cavanagh) to cure him, thinking he was evil Wells. The strength side effect was accelerated aging. With Barry (Grant Gustin) powerless, they tried to make the meta exert himself so much, he would die of old age. Caitlin (Danielle Panabaker) came face to face with Killer Frost. She helped her escape, but just as Frost was ready to get rid of her, Zoom (Teddy Sears) killed her. Wally (Keiynan Lonsdale) wanted to thank the Flash for saving his life, and is ready to turn his whole life around.

Spoilers below.