Cast[]
- Henry as Theodore
- Milo as Hank
- Oscar as George
- Denzel as Foduck
- Meg as Emily
- Momma as Rebecca
- Signor Roartonio as Shelburne
- Ivor as Clayton
- Daddo as Baddeck
- Hugglebot 1 as Guysborough
- Cobby as Northumberland
- Summer as Carla
- Mr. Growl as Owen
- Grando as Tex
- Captain Hollander as Bedford
- Gregor as Stewiacke
- Gertie as Pugwash
- Herold as Kingston
- Irving as Malarkey
- Nan-oh as Constance
- Roddy as Oliver
- Tommy and Gus as Phillip and Fillmore
- Estelle as Sigrid
- Kelly as Dorothy
- Izzy as Clementine
- Hugglebot 2 as Snorri
- Hunter as Fundy
- Jordan as Inverness
- Maude as Bonavista
- Monsterdragon as Cabot
- Mini-Monsters as Cabot's Cargo and Rock Borthers
- Officer Higgins as Canso
- Harry as Brunswick
- Shred as Barrington
- Stanley as Bobby
- Kayla as Isabel
- Jessie as Petra
- Ruby as Pearl
- Ben as Jennifer
- Mini as Blandford
- Fergus as Bingham
- Hugglebot 3 as Jasper
- Roy as Kulu
- Marasol as Bluenose
- Frank as Shamus
- Chris as Igloo
- Ted as Chester
- Hank as Seabright
- Toad as Colchester
- Joyce as The Queen Stephanie
- Samuel as Haliburton
- Monstertroll as Robo-Tug
- Hugglebot 4 as Bad Scrap
- Kiki as Katherine
- Roberto as Digby
- Glimmer Known as Bayswater
- Eduardo as Dartmouth
- Steve as Nautilus
- Josh as Kirby
- Peter as Truro
- Mimi Monstermouth as Freda
- Terry as Walter
- Candice as Gloria
- Hildegard as Molly
- Mrs. Growlburg as Caroquette
- Mayor Roariani as Millie
- Atta as Scally
- Operater as Rodney
- Selena as Julia
- Isabella Roarson as Emma
- Ernestine as Margaret
- Fergal as Gregor
- Matilda as Louis
- Denzel 3000 as Beiderbeck
- Kate as Margaree Pride
- Hugo as The Grain Ship
- Mr. Winklemonster as Henry
- Kirby as William
- Six-armed Hugglebot as R. Boat
- Dee as Aunt Ruby
- Diana as Cocomagh
- Dexter as Blankston
- Fred as Snorri
- Rhett as Kamel