Inside ‘Sesame Street’ as it fights to survive. With a lucrative HBO deal ending, the show tackles emotional well-being and remakes itself to win over a new generation.

Sesame Workshop, the nonprofit behind “Sesame Street,” is confronting what executives have described as a “perfect storm” of problems.

Over its several decades, the show’s setting has always been both realistic and idealistic. And it has evolved, much like the New York City streets that inspired it.