When Nick, who has Asperger's syndrome, struggles to carry on after the death of his brother Chaz, Chaz's best friend Randy takes Nick under his wing.
| Actor | Role |
|---|---|
 Booboo StewartNick Young | Nick Young |
 Harry Shum Jr.Chaz Young | Chaz Young |
 Joan ChenIrene Young | Irene Young |
 BD WongOliver Young | Oliver Young |
 Gregg SulkinRandy Goldman | Randy Goldman |
 Tyler PoseyDoug | Doug |
 Manish DayalAjit | Ajit |
 Justin MartinCameron | Cameron |
 Talulah RileyMs. Lee | Ms. Lee |
 Phil AbramsIra Goldman | Ira Goldman |
 Kelly HuMay Chung | May Chung |
 Amy HillDr. King | Dr. King |
 David Henry HwangPastor | Pastor |
 Jasmine Di AngeloBriana | Briana |
 Ron McCoyBearded Man | Bearded Man |
| LLynn Ann LeveridgeMaria | Maria |
 Ellie WenMarcy | Marcy |
| KKathryn LayngEdie | Edie |
 Major CurdaSamuel | Samuel |
| AAmmanfil OretaKen | Ken |
| EEmily MacaranasLucy | Lucy |
 Carla JimenezMrs. Rodriguez | Mrs. Rodriguez |
| GGavin ToyLuke | Luke |
| LLola GainesKristin | Kristin |
| JJordan HolmesTeen in Car | Teen in Car |
| JJames HunterCop (uncredited) | Cop (uncredited) |
| CConnor MacFirehouse Kid (uncredited) | Firehouse Kid (uncredited) |
 Isabella MarinoFirehouse Kid (uncredited) | Firehouse Kid (uncredited) |
| LLizzie MarinoFirehouse Kid (uncredited) | Firehouse Kid (uncredited) |
| EEilish K. MelickPam (uncredited) | Pam (uncredited) |