Steven Spielberg faced serious challenges making “Jaws” — from unpredictable weather to mechanical shark troubles — but ultimately created the original summer blockbuster.

The final episode of this three-part series explores the groundbreaking techniques behind the classic. Production designer Joe Alves reflects on the challenges of filming on the Atlantic Ocean (“Just finishing the movie was very, very difficult”). Listen to why the film’s legacy endures in cinema, pop culture, and the hearts of generations.