When filmmaker Alex Gray informed studio executive Bonnie Spence that Frank Miller had agreed to participate it was a moment of mutual celebration. Bonnie recalls that Alex’s excitement was fever pitch. Now their hoped-for movie-length documentary was a real possibility. But they needed an increase in the budget.

The documentary “Masterpiece” endures in large part because it is about the iconic “The Dark Knight Returns” graphic novel and its legendary creator Frank Miller. It was Frank Miller's vision (inspired by the work of Denny O’Neil, Neal Adams, Bob Kane, Bill Finger, and Jerry Robinson) that brought us the brooding, psychologically complex Bruce Wayne living in a world gone mad and filled with villains both subversive and deadly. This was a 180-degree turn from the comedic Batman TV series of the 1960s and it ushered in a new, darker vision of Batman that was expanded upon by subsequent writers and filmmakers.

I can’t help but think that in this new age of streaming, where the longest-running Netflix comedy or drama is 91 episodes (Orange Is The New Black), Supernatural: The Complete Series may be one of the last great TV on DVD and Blu-ray box sets.