Even though this show was considered a spin off of Diff'rent Strokes (1978), the connection between the two shows wasn't explained until a few months after the show premiered. Since both shows were produced by the same company, it was decided to have a plot where Larry Alder and Phillip Drummond (McLean Stevenson and Conrad Bain respectively) were old army buddies from Korea as a way of having the shows cross over and boost the ratings of Hello Larry.