According to Toon Zone, the first three episodes of Defenders of Berk will be:
Thursday, Sept. 19: Live and Let Fly (Flight Club)All episodes will air at 7:30 pm Eastern time. Any ideas about what each episode will be about?
Thursday, Sept. 26: The Iron Gronckle
Thursday, Oct. 3: The Night and the Fury
UPDATE 9/3: Here is a third Defenders of Berk trailer, which has several new dragons and calls the giant white dragon the "Screaming Death"! See the other two under the break.
Thanks Christine Huang!