Shark attacks, secret family members, and a new Firestorm.
Or just another week in Central City.
All of that changed when the S.T.A.R.

Credit: Cate Cameron /The CW
Labs particle accelerator exploded two years ago, injuring his knee and ending his football career.
Hes a viable match to be the new second half of Firestorm, which Stein so desperately needs.
But at least theres Hewitt…right?
Sadly, Hewitt and Stein cant seem to properly meld into Firestorm, despite how compatible they may be.
Hes a big fan of Stein, and the two bond over their shared interests.
But when it comes to the actual process of two bodies becoming one, they fail miserably.
Hewitt is furious, having gotten his hopes up for nothing, but he doesnt leave completely empty-handed.
And so Jax becomes the only viable option.
He comes to S.T.A.R.
Surprising most of the room, he has little desire to become the new Ronnie.
Good thing Stein hasnt spilled Ciscos secret just yet.)
After witnessing Hewitts rampage on the news, Caitlin feels personally responsible for all of it.
She caused Hewitts destructive abilities and scared Jax away.
Barry talks her down from the ledge of self-blame, though.
So Caitlin tries to make him ready.
She visits Jax at his garage and tells him she believes he can be a hero.
They successfully become Firestorm, saving Steins life and giving Barry a new ally with whom to fight Hewitt.
But we can say with some certainty that well see them again soon.
But with Steins health issues solved, theres still plenty of drama left in Central City.
Francine cant quite accept that, however, because shes dying.
She has MacGregors Syndrome (a disease from which both Mr. Its a soap opera-worthy revelation, but Joe takes Francine at her word.
Now, the tough choice that has befallen to Joe is whether to tell Iris.
He eventually decides to, giving her the opportunity to meet Francine or ignore her.
Iris does meet with her, at first appearing to be willing to welcome Francine back into her life.
Until she reveals what shes uncovered about Francine, that is.
While not quite of that magnitude, Barry has his own choice to make regarding his personal happiness.
Even Joe notices that Barry and Patty Spivots conversations look quite a bit like flirting.
First, he needs to ensure Patty isnt eaten by King Shark.
Barry catches up to the interloper before he escapes.
Once Barry recovers from the shock, this is probably going to take some explaining.