After Zoom unleashes an army of Earth-2 meta-humans on Central City, Barry is shaken when he sees their leader is the Black Canary's Earth-2 doppelganger, the Black Siren. Meanwhile, Wally takes to the streets to help The Flash stop the meta-humans, which worries Joe. Iris and Henry are concerned about Barry taking on Zoom.
Did You Know?
At 36:30 the woman talking on her mobile once again passes in front of Central City PD as she does in almost every episode. See more
After Black Canary unleashed a sonic scream to incapacitate The Flash, the scene switches from an on-the-streets view of the confrontation back to STAR Labs, where on the computer screen data about her attack is recorded. At the top of the screen, "250 DB" reads, indicating that the loudness of her scream was 250 decibels; however, the loudest theoretical sound that could be observed or recorded is 194 decibels. For practical measurements, past around 170 the scale for loudness falls apart; measurements this high only reflect energy, not loudness as the vibrations become more of a shock wave rather than an observable sound. At 250 decibels, the amount of energy for this sound is approximately equivalent to the explosive power of the atomic bomb dropped on Hiroshima. See more
[after getting a vibe from Earth-2
Birds. Why? It's like a Hitchcock movie in my head.
References Bye Bye Birdie
Performed by The Lumineers See more