James Gregory makes his first appearance as Inspector Frank Luger.
Just outside the squad room's door is a staircase railing. During the show's entire run, this is one of only two episodes where someone - in this case Inspector Lugar - walks around the railing as if to use the stairs.
After Inspector Luger asks Barney for some Ovaltine, he starts humming the theme to the old radio serial, "Little Orphan Annie," which was sponsored by Ovaltine.