These two dads are at odds. They do not share the same views on what Barry should be doing. Should he be undergoing a frightening experiment to get his speed force back? One says yes, the other says no.
Harry has one of those fancy clear boards that none of us have ever seen in real life, and he's busily crunching the hell out of some numbers. Hopefully, he's already done all of that before he built the accelerator and this is just backup!
Here Iris almost looks defensive as she stands before Barry. Hopefully this is not where they are discussing her feelings for him. Or, if she is, they are not what we've come to expect. There's still time.
This is Rupture. He's a metahuman from Earth-2 who will throw Cisco for a loop. Why? Because he's Reverb's brother, out for revenge. That means he looks just like Cisco's brother. Will that make it hard to take him down?