Cause and Effect

"Cause and Effect"
Information
Episode number	67 of 184
Original airdate	May 9, 2017
Written by	Judalina Neira Lauren Certo
Directed by	David McWhirter
Guest stars
Tom Felton as Julian Albert (special appearance by) Anne Dudek as Tracy Brand Danielle Nicolet as Cecile Horton Richard Zemen as Lucious Coolidge Andre Tricoteux as Savitar
Chronology
Preceded by	"I Know Who You Are"
Followed by	"Infantino Street"

"Cause and Effect" is the ???th episode of The Flash. It aired on May 9, 2017. "Cause and Effect" is the twenty-first episode of the third season of The Flash, and the sixty-seventh episode overall. It aired on May 9, 2017.

Synopsis

Barry takes drastic measures to stop Savitar. Meanwhile, H.R. continues to push Tracy Brand to design the trap for Savitar, and Killer Frost returns with an interesting proposal.

Gallery

Videos

The Flash 3x21 Promo "Cause and Effect" (HD) Season 3 Episode 21 Promo

Promo

The Flash Cause And Effect Trailer The CW

Extended Promo

The Flash Cause And Effect Scene The CW

The Flash Inside The Flash Cause And Effect The CW

Trivia

• Cisco mentions the Star Trek: The Original Series episode "The Enemy Within" in which Captain Kirk is split into good and bad personalities.
  • H.R. mentions having Star Trek: Voyager on his Earth, to which Cisco claims to hate spin-offs. This is likely a tongue-in-cheek joke, considering the fact that The Flash is a spinoff of Arrow.
• According to Barry's driver's license, it says that he renewed it on March 10, 2014. However, Barry was in a coma from the time of December 11, 2013 to September 2014, meaning he couldn't have renewed it during this time, assuming that it has to be renewed in person (unless a military member or dependent) like in real-life Missouri that Central City is placed in.
• After losing his memories, Barry asks to be called "Bart", a reference to to Bart Allen, who is Barry and Iris' grandson in the comics. Ironically in the Arrow episode "The Brave and the Bold" Quentin Lance mistakenly calls him Bart which also references his future grandson in the comics.
  • Barry is revealed to have been a huge fan of anime in high school, with Iris mentioning that Dragon Ball Z was one of his favorites.
  • Coincidentally, this episode aired on the Japanese-recognized holiday "Goku Day".

• Rather than "the Flash", Barry suggests that they call him "the Streak", a name which was first used to identify The Flash in the first season of the show and also, a moniker used by Clark Kent on Smallville.

• Tracy states they require 38.6 terajoules (38,600,000,000,000) of energy to trap Savitar, and Cicso claims this is more than the energy of the Sun; this is vastly inaccurate, as the Sun releases 384.6 yottajoules (384,600,000,000,000,000,000,000,000) of energy every second.

Errors/goofs

• As Savitar's armor begins to attack Barry, Barry's mask is removed. However, after the armor steps on Barry, his mask is seen worn on his face.