And Barry has to learn how to save the day with a fractured Team Flash.

How does Jesse become involved after running away episodes ago?

But Jesse is done with her father.

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Credit: Katie Yu/The CW

Though he looks middle-aged, Griffin is only 18, and he demands a cure from… Harrison Wells.

Biochemistry was one of her five majors at college, after all.

So theres little doubt Earth-2 has our education system beat with the nonchalant way Jesse references her multiple disciplines.

So a plan is hatched.

Oh, and he can only absorb one strike from Griffin before hes susceptible to real damage again.

With the help of Jesse, they track Harry to Central City Amusement Park (a.k.a.

an abandoned facility but this time with lights and a ferris wheel) using his watch.

Joe and Cisco provide backup, helping to trick him into overusing his powers.

Jesse and Harry reunite, and the former decides to come back home with her father.

Harry agrees… so long as she doesnt run away again.

Wally thanks Barry for saving his life and promises to not waste his second chance at life.

And Barry may soon receive a second chance of his own.

Why, with Particle Accelerator Explosion 2: Electric Boogaloo.

Thats certainly one way to approach the problem.

And speaking of, the seasons big bad is back on his Earth playing house with Caitlin.

While there, she discovers the man in the mask and another prisoner, Killer Frost.

Yes, Caitlin comes face to face with her face, and the meeting gives Frost an idea.

After the ordeal, all Caitlin wants is to go home and all Zoom wants is to be thanked.

Hes got more in mind than a reunion, though.

Looks like its time to get started on that second explosion, Harry.