I wonder why the makers of the show tortured us with half episode without words. I really can't get why they tried to do. Maybe something about Mac's alexia? Maybe they just tried to get "artsy"?
Please, leave cutting edge visual narrative to, let's say, Breaking Bad, don't try to be avant garde if you are just a mainstream TV show, please give us good stories and spare us from aesthetic experiments you can't sustain (it could have been better if the WHOLE episode was speechless. And with no music)
Also I couldn't really get the story. A ridiculously accused teacher decides to kill the lady who accused him instead of sueing her? And tries to shoot her in a public event even though he is a very lousy shooter? And he drops the gun in a container near two kids when he says he CAN'T harm a kid? What was he thinking? That the kids would ignore the dropping and continue playing as if nothing happened?
And what about the hospital's security? Nobody noticed that some stranger walked into a patient room and stayed there long enough to write on the window glass and attempt to murder her (but backs when sees a kid's drawing)?
Absurd, absurd, absurd to the point of absurdity.
My guess is that the writers are suffering of Mac's condition and can't remember basic stuff, like writing a solid story.