Downloaded Episode of Glee stops 1/4 of the way

Hello All,
I have a 16G ipad with 12G space. From the itunes store I purchased the Glee episode "Furt". Unfortunately it only plays 18 minutes and the screen goes dark. I have checked my account and it indicates: download complete.
Please help.
Thanks
Happiest Holidays
alpacasrme

Hi Marine= Thank you

Thank you. I contacted itunes from the link in my receipt. They gave me a refund and said to try again. They were checking on it.