The Flash is useful for English practice if you can already follow natural conversations. The language can be demanding, as characters often use less common expressions and more specific terms. With the dialogue moving at a natural rhythm, viewers should catch most of it, although a few moments may still be challenging. Because the plot is fairly straightforward, learners can focus more on the dialogue than on figuring out the story. The Flash works best for learners around B1/B2 who are ready for more demanding vocabulary.
