Fresh from Jared Leto's somewhat underwhelming turn as The Joker in Suicide Squad, it's become even more apparent just how brilliant Heath Ledger's version was in The Dark Knight. However, it's not just about the actor portraying the role, the entire film and script adds to what makes a character strong.

YouTube channel Lessons from the Screenplay has dissected The Dark Knight in the video above, explaining the function of an antagonist in a story, and why the Joker is the perfect opponent for the Dark Knight. From examining Batman's weaknesses and how The Joker diffuses Batman's strengths, to what the Dark Knight learns from The Joker's sick games, it's quite clear just how important a well-crafted story is to a great role.

In case you missed it, find out why Jared Leto was tricked into playing the Joker.

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