Has anyone experienced download failure with Fringe Season 4 Enemy of My Enemy episode?

Question

I have purchased the season pass for "Fringe" season 4 (2011-2012) and I am having a problem downloading a specific episode - "Enemy of My Enemy" which aired Friday January 20 and was available for download on Saturday January 21. I have been completely unable to successfully download this episode - and only this episode. Since the first failure, iTunes has successfully downloaded the following items, all also purchased via a season pass: "Criminal Minds" (air date 2012-01-25), "Big Bang Theory" (air date 2012-01-26), and the latest episode of "Fringe" (air date 2012-01-27).
I have submitted a support request to Apple and have received so far one response - I have attempted all of the suggestions and reviewed the link (http://support.apple.com/kb/TS2384) and nothing has worked. I have attempted to download the episode to a Windows 7 machine - same failure. I have attempted to download the episode to a different Mac - same failure.
The end result of each attempt has been either an error "50" or an error "8008" after approximately 500 Mb of the episode is downloaded (out of approximately 1.4 Gb total). I have changed the download from an external drive to an internal drive, and still get the same error.
Only this one episode of this one show am I experiencing failure.
Any help will be greatly appreciated, and I would especially appreciate hearing either from anyone experiencing the same problem with this episode, or anyone who has successfully downloaded this episode.
Thank you.
karl

Answer 1

Update: I have now successfully downloaded the HD version of "Enemy of My Enemy." However, I can't say what happened to make this possible.
After complaining to Apple and failing to get any meaningful response, I waited about 12 hours and then tried again to resume the download with Store > Check for Available Downloads and again got the same -50 error message. Tried a few times, in fact.
Then, just for fun, although I'd already tried this several times previously, I quit iTunes, deleted my ~/Music/iTunes/iTunes Media/Downloads folder, and reopened iTunes. Then I again chose Store > Check for Available Downloads. While the download was in progress, I paused it and resumed it several times, because it seemed to be going very slowly and sometimes I've found that when I pause and resume, downloads go more quickly afterwards. That was the case again with this file. Once it was going at a good clip, I held my breath as it approached the 500.2 MB mark, but the download just zipped right past and continued all the way to the end.
It may have been that Apple actually listened to us and fixed a broken file on their end. (However, even if so, something is still not right, because we shouldn't continue getting the -50 error messages when we try to resume partially downloaded files.) Another possibility, and this is purely speculation, is that when you pause and resume, sometimes the download resumes from a different server. If that is the case, then it's conceivable that at least one server has always had a broken file and at least one has always had a good version, so that it was, and is, the luck of the draw as to which version gets sent to whom. But again, that's just a wild guess.
Good luck to all those still trying to download the file!