With General Morando's invasion of Earth imminent, Krel tries to stop the fleet's advance with unwitting help from the kids of Arcadia.
- Tatiana Maslany as Aja Tarron
- Diego Luna as Krel Tarron
- Nick Offerman as Varvatos Vex
- Glenn Close as Mothership
- Alon Abutbul as General Morando
- Ike Amadi as Detective Scott
- Hayley Atwell as Zadra
- Jennifer Hale as Izita
- J.B. Smoove as Phil
- Tom Kenny as Officer Brennan
- Laraine Newman as Nana
- Chris Obi as Loth Saborian
- Cole Sand as Eli Pepperjack
- Charlie Saxton as Toby Domzalski
- Yara Shahidi as Darci Scott
- Fred Tatasciore as Señor Uhl
- Lauren Tom as Mary Wang
- Reginald VelJohnson as Jerry
- Frank Welker as Luug
- Steven Yeun as Steve Palchuk
- Morando is temporarily grounded on Akiridion-5 by Eli Pepperjack.
- Eli gains respect from the Resistance.
- It is revealed that Eli is allergic to avocados.
- It is revealed that after Krel's repairs to Mother in "Moving Day", she developed an attitude of roasting people, like she did to Aja when she lost the second-to-last drone, and then later to Morando when his ship is destroyed, and eventually to Krel in "There's Something About Gwen (of Gorbon)".
- Krel invents new and improved serrators which contains portable transduction, allowing him, Aja, and Varvatos to change between their human and Akiridion forms at will.
- Detective Scott unintentionally foreshadows Wizards when explaining to Varvatos that "... ever since trolls literally surfaced in this town, everyone's got a theory on what's next. Vampires, wizards. My own daughter thinks the Billycraggle is real."
- Once again, the character Gladys Groe, a Changeling spy in Trollhunters, is seen as a customer at a restaurant playing Krel's dogfight game, presumably at the same restaurant as she appeared in "Truth Be Told" as the waitress for Aja and Steve's date.
- A blue Vespa 300 GTS Super can be seen in the magazine Detective Scott is reading while talking to Varvatos.
- The featured quote includes a likely allusion to the famed line "Help me, Obi-Wan Kenobi. You're my only hope." from Star Wars Episode IV: A New Hope.
- This is lampshaded by Eli himself when he responds "I know I'm the last hope. I've seen the movies, okay?"
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