Steven Bocho, one of the writers for the series as well as one of the co-creators (along with David E. Kelly), gives his take on things as well and has a few interesting anecdotes about the series. (17:26)
Harris covers not only his career within the context of the show but also how it lead to some problems with type casting and with people thinking of him only in terms of Doogie Howser and not as a serious actor.(16:16)
The now-grown-up Doogie looks back and says very nice things about all of his old castmates (9:17).
A 12-minute interview with the now-adult Neil Patrick Harris, who talks about the problems of being a child actor. He was the same age as Doogie -- 16 in Season 1, 19 in Season 4 -- and had to adhere to child-labor laws, not to mention the horrors of going through puberty in front of America. (He confirms what was obvious to viewers: He didn't reach even the beginnings of adolescence until he was 15, and he grew about four inches in height between Season 2 and 3.) It's an enlightening and amusing segment, particularly when Harris talks about the finer points of following (and evading) the child-labor laws, and the accommodations that had to be made for his minor status.
James Sikking spends nine minutes reflecting on his role as Doogie Howser's dad. He talks a lot about his relationship with Neil Patrick Harris, and he covers some of the same territory as Harris (i.e., the challenge of filming with stand-ins for Doogie while Harris was with his law-mandated tutor). He speaks fondly of his time on the show, and seems to be sincere about it. (9:33).