Cause and XS



Critic Consensus: While "Cause and XS" doesn't feature much of the show's titular superhero, the strong supporting characters and time loop gimmick make for a worthwhile ride.

Episode Info

After Iris lands in serious danger, Nora races to save her mother. Barry puts the finishing touches on the metahuman cure, leaving Cisco with a rare night off so he decides to take Kamilla on a date.


Grant Gustin
as Barry Allen/The Flash
Candice Patton
as Iris West
Danielle Panabaker
as Caitlin Snow
Carlos Valdes
as Cisco Ramon
Jesse L. Martin
as Det. Joe West
Tom Cavanagh
as Harrison Wells
Show More Cast

Cause and XS Videos

Cause and XS Photos

Critic Reviews for Cause and XS

Another Nora-centric episode...perfect. This is an easy episode though; a lot of the shots are the same, so it's like a copy and paste art project almost.

Apr 24, 2019 | Rating: 7.7/10 | Full Review…

Cause and XS was a lot of fun and was maybe the season's best episode even with The Flash only around in a cameo role.

Apr 17, 2019 | Rating: 9/10 | Full Review…

It's become almost an annual tradition, and as usual, this season's time loop episode did not disappoint -- and also flipped the script by putting Nora in the driver's seat

Feb 13, 2019 | Full Review…

This was a good episode overall because the team was able to defeat Cicada without the Flash. It's good to give them these opportunities so they can be the hero for once.

Feb 13, 2019 | Full Review…

That messing around with the timestream can often bring about dire consequences isn't exactly a new lesson for this show, but..."Cause and XS," still somehow manages to make a well-worn trope fun to watch.

Feb 13, 2019 | Rating: 4/5 | Full Review…

If there's one thing The Flash Season 5 Episode 14 taught us, it's that sometimes people don't learn their lesson. In this case, I'm referring to both Nora Allen and the writers who created her character.

Feb 13, 2019 | Rating: 2/5 | Full Review…

I suspect this episode was light on our star to accommodate his honeymoon. Luckily, the rest of the cast is more than up to the task of carrying the show without him.

Feb 13, 2019 | Full Review…

It's best just to accept the fact that the rules change depending on the needs of each individual story. By that measure, "Cause And XS" is one of the more enjoyable episodes of the season.

Feb 13, 2019 | Rating: B+ | Full Review…

No matter how hard [The Flash] is apparently trying to overcome its shortcomings, they still manifest...Nevertheless, it proved to be a fun adventure that played with elements we haven't seen featured on the show in quite some time.

Feb 13, 2019 | Full Review…

The Flash tries and fails to pay tribute to Groundhog Day in "Cause and XS."

Feb 13, 2019 | Rating: 5.2/10 | Full Review…