Earlier this week, “Iron Man” director Jon Favreau discussed his comic book-based hit film on “The Treatment,” the KCRW public radio show hosted by film critic Elvis Mitchell.

Favreau discusses how “Iron Man” — like all his films, including “Swingers,” “Elf” and “Made” — are modeled on the Joseph Campbell archetypes famously detailed in the book “The Hero With a Thousand Faces.”

“You need a roadmap,” opines Favreau, “and why not pick the best roadmap there is?”

Explosions also help.

“The Treatment” is one of my go-to podcasts. If you’re a screenwriter or filmmaker, you’ll probably enjoy it as well.

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