The CW has released an official description for the March 19 episode of The Flash!
The episode is called “Time Bomb” and here’s how they describe it:
NORA DECIDES TO TELL BARRY AND IRIS THE TRUTH ABOUT THAWNE — Team Flash finds out that a suburban mom named Vickie Bolen (guest star Catherine Lough Haggquist) is in danger and they race to save her. Upon meeting her, they discover she’s a meta-human who is hiding her abilities from her family. Barry (Grant Gustin) encourages Vickie to share her secret with her family, which makes Nora (Jessica Parker Kennedy) realize she needs to come clean with her parents about Thawne (Tom Cavanagh). Rob Greenlea directed the episode written by Kristen Kim & Sterling Gates (#517). Original airdate 3/19/2019.