As Della rebuilds her ship, Penumbra becomes convinced Della’s planning an attack. Meanwhile, Donald's nap keeps getting interrupted by adventure.
- David Tennant as Scrooge McDuck
- Danny Pudi as Huey Duck
- Ben Schwartz as Dewey Duck
- Bobby Moynihan as Louie Duck
- Kate Micucci as Webby Vanderquack
- Paget Brewster as Della Duck
- Julie Bowen as Lieutenant Penumbra
- Lance Reddick as General Lunaris
- Tony Anselmo as Donald Duck
- Chris Diamantopoulos as Storkules, Mythical Goat
- Michael Chiklis as Zeus
- Rob Paulsen as Gibbous
- April Winchell as Zenith, Spear Computer
- Laura Bailey as Palus
- Kari Wahlgren as Roxanne Featherly
- Sam Riegel as Moonlanders
- The events of The Impossible Summit of Mt. Neverrest! and The Living Mummies of Toth-Ra! are mentioned by Della, talking of all of the adventures she would love to do with her boys when she gets back to Earth, even though they already had them in Season 1.
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