MINISERIES FINALE: This six-part documentary series on the history of comics, told from the perspective of Walking Dead creator Robert Kirkman, ends with an episode devoted to Image Comics, the firm that released The Walking Dead as a graphic novel before it was adapted by AMC. It’s called “Image Comics: Declaration of Independents,” and, aside from a couple of other titles like Teenage Mutant Ninja Turtles, may not otherwise be worth the devotion of an entire hour, unless you’re a big supporter of, say, The Mice Templar or Flaming Carrot Comics. But let’s let Kirkman make his case.