Fionna en Cake beginnen – met de hulp van de voormalige IJskoning Simon Petrikov – aan een multiversum-hoppend avontuur en een reis vol zelfontdekking. Ondertussen schuilt er in de schaduw een krachtige nieuwe tegenstander die vastbesloten is ze op te sporen en uit het bestaan te wissen.
 | Seizoen 1 Aflevering 1 Fionna Campbell Datum: 2023-08-31 Lengte: 25 min |
 | Seizoen 1 Aflevering 2 Simon Petrikov Datum: 2023-08-31 Lengte: 26 min |
 | Seizoen 1 Aflevering 3 Cake the Cat Datum: 2023-09-07 Lengte: 24 min |
 | Seizoen 1 Aflevering 4 Prismo the Wishmaster Datum: 2023-09-07 Lengte: 24 min |
 | Seizoen 1 Aflevering 5 Destiny Datum: 2023-09-14 Lengte: 25 min |
 | Seizoen 1 Aflevering 6 The Winter King Datum: 2023-09-14 Lengte: 24 min |
 | Seizoen 1 Aflevering 7 The Star Datum: 2023-09-21 Lengte: 24 min |
 | Seizoen 1 Aflevering 8 Jerry Datum: 2023-09-21 Lengte: 25 min |
 | Seizoen 1 Aflevering 9 Casper & Nova Datum: 2023-09-28 Lengte: 24 min |
 | Seizoen 1 Aflevering 10 Cheers Datum: 2023-09-28 Lengte: 26 min |
| Production | Adam Muto | Executive Producer |
| Production | Sam Register | Executive Producer |
| Writing | Natasha Allegri | Characters |
| Production | Fred Seibert | Executive Producer |
| Production | Debora Arroyo | Producer |
| Writing | Jack Pendarvis | Story Editor |
| Visual Effects | Robert Alvarez | Supervising Animation Director |
| Production | Keri Fitzsimmons | Production Manager |
| Production | Steve Lininger | Production Coordinator |
| Visual Effects | Danny Cragg | Lead Character Designer |
| Art | Michael DeForge | Title Designer |
| Visual Effects | Jesse Balmer | Visual Development |
| Visual Effects | Tom Herpich | Visual Development |
| Visual Effects | Yori Narpati | Visual Development |
| Art | Jesse Balmer | Background Designer |
| Production | Sarah Noonan | Casting |
| Production | Alden Osborne | Casting |
| Production | Kristi Reed | Other |
| Sound | Bill Devine | Sound Engineer |
| Editing | Paul Douglas | Supervising Editor |
| Sound | Jim Hearn | Dialogue Editor |
| Visual Effects | David Estes | Simulation & Effects Artist |
| Sound | Amanda Jones | Original Music Composer |
| Sound | Scott Manke | Sound Editor |
| Sound | Alex Borquez | Supervising Sound Editor |
| Sound | Nick Gotten III | Supervising Sound Editor |
| Sound | Nick Gotten III | Sound Re-Recording Mixer |
| Crew | Alicia Parkinson | Post-Production Manager |
| Production | Cecilia Rheins | Other |
| Production | Stacy Renfroe | Other |
| Production | Alan Pasman | Other |
| Production | Kelly Crews | Production Supervisor |
| Production | Brent Tanner | Production Supervisor |
| Production | Ed Adams | Production Manager |
| Production | Vishnu Athreya | Executive In Charge Of Production |
| Production | Michelle Truong | Executive In Charge Of Production |
| Production | Sandra Lee | Supervising Producer |
| Visual Effects | Efrain Farias | Color Designer |
| Editing | Carrie Owens | Assistant Editor |
| Visual Effects | Nick Cross | Animation |
| Visual Effects | Shawn Toshikian | Animation |
| Art | Hans Tseng | Art Direction |
| Writing | Kate Tsang | Staff Writer |
| Production | Evelyn Martinez | Production Assistant |
| Visual Effects | Delfina Perez Adan | Character Designer |
| Art | Marissa Kao | Prop Designer |
