Four orphaned and homeless siblings happen upon an abandoned boxcar, which, they furnish with all the comforts of home. Fearful that they will be sent to live with their grandfather they have never met, the children keep their new home a secret.
| Actor | Role |
|---|---|
 Illeana DouglasMary (voice) | Mary (voice) |
 Mackenzie FoyViolet (voice) | Violet (voice) |
 Zachary GordonHenry (voice) | Henry (voice) |
 Joey KingJessie (voice) | Jessie (voice) |
 Jadon SandBenny (voice) | Benny (voice) |
 Martin SheenGrandfather Alden (voice) | Grandfather Alden (voice) |
 J.K. SimmonsDr. Moore (voice) | Dr. Moore (voice) |
 D. B. SweeneyBaker (voice) | Baker (voice) |
 Audrey WasilewskiBaker's Wife (voice) | Baker's Wife (voice) |