Justice League Unlimited

Trivia: This is the first episode where a Justice League member refers to Diana as Wonder Woman when Batman confronts her.

Towards the end of this episode, when Hawkgirl and Batman are surveying the destruction in the streets, in the scene with the firefighters, the firefighter second from the bottom is holding a hose that is not connected to anything, yet water is still flowing from the end of it.

How does Hippolyta know the story of Aresia's drowning if the captain died at the shore?

The woman's car that Wonder Woman helps by lifting the man's truck out of the way, doesn't have any headlights or front lighting at all.

In Aresia's flashback to World War II the plane that bombs the houses is a modern-day 21st century plane.

At least in the comics, Solomon Grundy is a dead guy reborn as a plant-creature that doesn't breathe and is made out of wood. Arguably, neither Batman's electro-rang or Aresia's gas would affect him. There's no indication here or in any of his later appearances that he is a living being but rather some kind of animated corpse - he wouldn't breathe or have a working nervous system to be electrocuted either.