Next week's episode of The Flash , "Fury Rogue," will see the debut of Siren-X, the latest alternate universe version of Katie Cassidy's Laurel Lance. This new character appears to be Laurel's Earth-X counterpart.
In the 2017 Arrowverse crossover, "Crisis on Earth-X", fans were to introduced to Earth-X, an alternate reality where the Nazis won World War II. Team Arrow, Team Flash, the Legends, and Supergirl had to team-up to battle Nazi versions of themselves, including Overgirl (Melissa Benoist), and their Fuhrer, the Black Arrow (Stephen Amell). One Earth-X character, Citizen Cold (Wentworth Miller), left his world for a brief stint with the Legends. Now it appears that one more Earth-X character will be crossing over to Earth-1.
The CW has released photos from next week's episode of The Flash, which reveal the inclusion of Earth-X's Laurel Lance. This character's appearance seems similar to her Earth-2 counterpart, Black Siren, who is currently a series regular on Arrow. In one photo, Siren-X is sporting a weapon that looks an awful lot like Leoard Snart's cold gun. Any doubt that Siren-X is a villain is put to rest by another photo, which shows Caitlin (Danielle Panabaker) and Joe (Jesse L. Martin) as prisoners of Siren-X.
Siren-X's debut will coincide with the return of Citizen Cold. The synopsis for the episode reveals that Barry (Grant Gustin) will call on Citizen Cold to help with "transporting a dangerous meta." We know from the promo that the meta in question is Fallout, the character who nearly destroyed Central City in "The Trial of the Flash." Things could get bad for Team Flash (and the world) if The Thinker gets his hands on Fallout.
Siren-X's role in the story is currently clear, though it could have connections to Citizen Cold, as both are from the same universe. If Siren-X is anything like Black Siren, she could also be hired help for The Thinker. The Thinker could have sent her to capture Fallout for him.
It remains to be seen how this character will differ from Black Siren, since both are apparently villains. Though Black Siren is still far from redemption, she does seem to have a distaste for torture, which was on display in last night's episode of Arrow. Siren-X, on the other hand, may be a different story. As a character from a world run by Nazis, this version of Laurel Lance could be the most evil one we've seen yet.
The Flash: The Thinker Claims Two More Victims
Season 4 of The Flash continues Tuesday, April 24 on The CW.