Act 2
From Hayashi Park Potterverse for 5th ed. Dungeons and Dragons (5e)
Act 2: Something Bad Happens/The Hook
Act 2 accomplishes
The story leaps into irreversible motion with an event that we cannot ignore [The Mists]. Often a henchman, rarely the Big Bad.
Crucial: the goal implied by the end of this scene [protect Ireena] is the wrong one for the hero. Avoid a boring slow start with a great hook!
Example Act 2: The rebel blockade runner is boarded by Darth Vader (but not the emperor).
Example Act 2: The Ringwraiths enter the Shire (but Sauron doesn't).
This is the third five minutes of a TV show.