Curtis Pike and his family are selected to test a new home device: a digital assistant called AIA. AIA observes the family's behaviors and begins to anticipate their needs. And she can – and will – make sure nothing – and no one – gets in her family's way.
| Actor | Role |
|---|---|
 John ChoCurtis | Curtis |
 Katherine WaterstonMeredith | Meredith |
 Keith CarradineMarcus | Marcus |
 Havana Rose LiuMelody / AIA (voice) | Melody / AIA (voice) |
 Lukita MaxwellIris | Iris |
 Ashley RomansSam | Sam |
 David DastmalchianLightning | Lightning |
 Wyatt LindnerPreston | Preston |
 Isaac BaeCal | Cal |
 Bennett CurranSawyer | Sawyer |
 Greg HillHenry / RV Man | Henry / RV Man |
 Riki LindhomeMaud / RV Woman | Maud / RV Woman |
| AAshton Essex BrightJackson | Jackson |
 Mason Shea JoyceEli | Eli |
 River DroscheKaden | Kaden |
 Todd WaringPapa | Papa |
| SSimon Craig RaynesJohnny | Johnny |
| RRogelio Douglas IIIYoung Man | Young Man |
 Zeke AltonParamedic | Paramedic |
 Pam CookLady | Lady |
 Ben YoucefBen | Ben |
| LLouis De La CostaSamuel | Samuel |
 James Mitchell-ClydeSWAT Team Leader | SWAT Team Leader |
 Vaughndio ForbesSWAT Team Member #2 | SWAT Team Member #2 |
 Maya MankoAimee | Aimee |
 J.D. GarciaMasked Figure #1 | Masked Figure #1 |
 Dustin Stern-GarciaMasked Figure #2 | Masked Figure #2 |
 Timothy Thomas BrownMasked Figure #2 | Masked Figure #2 |
 Jimmy GaleotaJimmy | Jimmy |
 Rachael Hip-FloresOriginal AIA Voice (voice) | Original AIA Voice (voice) |