iTunes Error 9006

Internet died while I was downloading the series 4 of Lost. Now I've come to resume, it won't continue with episode 2 due to this Error 9006.

Pop up comes telling me to go to Store (top of iTunes) and check for purchases which I have done but 9006 is repeating itself.

I'm loath to pay for the episode again, and think it would take far too long for me to get a response out of Apple, every proceeding episode will probably have downloaded by then.

Anyone able to spare me the £1.89 of a second purcase with a fix? :D

Nevermind, if you leave it for like half an hour it works. PHEW.