[s7e2] Shock To The System -

Since the title can refer to a few different series, here are the dominant "stories" for each:

Seeing the damage his logic has caused provides the emotional "shock" needed to break the Speed Force's hold and return his feelings. Other Shows with this Episode Title [S7E2] Shock to the System

He chooses to save Iris from the Mirrorverse but does so with computer-like logic that harms his friends and causes Iris to suffer a seizure. Since the title can refer to a few

Meredith continues to hide her pregnancy and subsequent miscarriage from Derek as she struggles to get cleared for surgery. She eventually breaks her silence when she realizes she can't handle his reckless driving anymore. [S7E2] Shock to the System