BC12, a red blood cell, lives and works in a body that is currently struggling with dehydration. He is given the task of traveling to Brian, the brain, and convincing him to drink some water. BC12 sets off on the journey and encounters various organs along the way, all of which have an opinion (sometimes more, sometimes less helpful) about Brian and his passivity.
| Actor | Role |
|---|---|
| RRosa PaylarBC12 | BC12 |
| IIlya Lorenz BarrettBrian | Brian |
| EEd CantuLungus Shmungus | Lungus Shmungus |
| EEdi DelićOliver | Oliver |
| DDiana WestphalNeigh | Neigh |
| KKosta PapazogluKid | Kid |
| EEve LamellCardi O | Cardi O |