There’s also one short featurette from the Fox Season 2 release, “The Hill Street Blues Story”, which is not included in this release. (It’s actually a five minute interview with Greg Hoblit where he discusses his experience as a producer and director on the series.) Given the longer interview...
That additional background - seriously - is available in a chapter of a book written by Todd Gitlin, "Inside Prime Time." On the basis of Kevin's review (I agree, the review is terrific), I'm guessing Kevin may be familiar with Gitlin's work. (That is *not* an accusation of plagiarism.)