There doesn't seem to be any particular rule regarding which shows require inline citations.  Do some series require inline citations next to them in the article, but not others?  If so, which ones?  And why?  Also, you are completely ignoring context regarding my use of IMDb as a source.  IMDb is not an acceptable source for actual information, but it IS an acceptable source when one is simply proving that a film actually exists, which is all that I was doing in the edit that you cited.