Originally Posted by MattP
For anyone unable to get Episode 3, please shut down the game application (not just close it), log out of your iTunes account and shut down the device. Now reboot the device and make sure you have a strong wifi connection. Log into your iTunes account and restart the application. You will see a momentary black screen as the game checks for the latest updates and then you will be taken to the Main menu.
If trying these steps a few times doesn't work, reinstalling the app from the iTunes store should resolve the issue. This will unfortunately remove your save games, so please try the above steps first.
it worked (i used my 3g though).
Now let's play this episode :3