'Butterfly, Lost' follows Ben, a young man on the autism spectrum, who is struggling to make his way in the world after the death of his sister Etaín, the only person he ever felt truly comfortable around.
| Actor | Role |
|---|---|
| DDaniel BrindleyBen | Ben |
 Mei BignallArianne | Arianne |
| AAmy EllisEtain | Etain |
 Edward TidyOllie | Ollie |
| BBlue EkhaletruoGeorgina | Georgina |
| KKai NossekAaron | Aaron |
| JJonathan GodsiRollo | Rollo |
| LLara Bulford WelchVanessa | Vanessa |
| LLauryn EnglandSharon | Sharon |
 Michael Stafford WellsDr Epson | Dr Epson |
| AAmber SatchwellEloise | Eloise |
| NNatalie Turner SylvesterCleo | Cleo |
| HHeather RobbinsKatherine | Katherine |
| MMimi HatriSophia | Sophia |
| GGeorge SavageLuke | Luke |
| SShane WallerOfficer Scott | Officer Scott |
| BBen GoldsmithThe Bouncer | The Bouncer |
| JJericho TaylorCherie | Cherie |
| WWilliam WillisPete | Pete |
| RRichard HearneGlenn | Glenn |
| RRebecca WinterOfficer Summers | Officer Summers |