Guest Stars Steve Alterman voices Additional Voices Mitch Carter voices Additional Voices Nolan North voices Stoick Haddock Chris Edgerly voices Gobber Alfred Molina voices Viggo Grimborn Hakeem Kae-Kazim voices Krogan David Tennant voices Spitelout Jorgenson James Arnold Taylor voices Throk Neil Dickson voices Additional Voices Lucas Grabeel voices Gustav Larsen Edie Mirman voices Additional Voices Jim Pirri voices Additional Voices Hakeem Kae-Kazim voices Drago Hakeem Kae-Kazim voices Additional Voices Daisy Tormé voices Additional Voices