In Review: The Flash – Cause and Effect

Barry takes drastic measures to stop Savitar.

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.

Review: This episode goes some way to explain the paradox, which caused the creation of Savitar and it looks like it will not be an easy one to put right.

As many have predicted. The “Don’t trust Barry Allen” warning that Rip Hunter received in this seasons ‘Legends Of Tomorrow’ has a role to play in this episode. We learn that the Barry Allen that Rip was referring to was Savitar.

In an effort to try and stop Savitar. Cisco and Julian Albert concoct a scheme that involves erasing Barry’s memories of events that involved Flashpoint and the creation of his various time remnants. But it all goes terribly wrong when it erasing all of Barry’s memories as well as those of Savitar. Hence the cause and effect.

This allows the writers to have some fun with showing us a Barry Allen who is devoid of the darkness and responsibility that he has. It also allows Iris to see a lighter version of her future husband. But inevitably she comes to realise that the person she loves is made up of both light and dark.

Cisco compares the whole Flash and Savitar thing with the original Star Trek episode ‘The Enemy Within’ where a transporter mishap creates an evil duplicate of Kirk.

The effects of Barry’s memory loss wind up having implications that reach beyond him. Which is what makes this a fun watch.

What makes things more interesting is the fact that Killer Frost has to form an uneasy alliance with team Flash in order to get Savitar’s memories back. An alliance, which sees Cisco trying to reach out to Killer Frost and try and reach Caitlin.

On the lighter side of the episode. We get some fun stuff from H.R and his burgeoning relationship with Tracy Brand. Them comparing notes over coffee and such is fun. But funnier still is how much alike they seem. The only difference being that Tracy is smarter in the whole science department.

I really enjoyed this episode despite the complexities of the time loop and everything else, which is yet to be fully explained.


The Flash - Cause and Effect
  • Story
  • Acting
  • CGI
  • Incidental Music

Ian Cullen is the founder of and has been a fan of science fiction and fantasy from birth. In the past few years he has written for 'Star Trek' Magazine as well as interviewed numerous comics writers, television producers and actors for the SFP-NOW podcast at: When he is not writing for Ian enjoys playing his guitar, studying music, watching movies and reading his comics. Ian is both the founder and owner of You can contact ian at:
One Comment
  • BS
    11 May 2017 at 10:44 pm -

    Anything related to ‘time remnants’ is confusing as heck.
    Can anyone explain it simpler to what ‘time remnants’ are?

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