“The fifth season premiere picks up exactly where we left off, with Team Flash celebrating the new addition to the family—a celebration that’s interrupted when another new addition to the family unexpectedly crashes the party.
“As you no doubt recall from the fourth season finale, this is Nora, future daughter of Barry and Iris, and a speedster in her own right.
“Known as XS in her own time, she’s the one who turned up in time to help Barry redirect the satellite, which she says was a mistake since she now can’t go fast enough to enter the Speed Force and return to her own time.”
Read more at The AV Club
