When their trip to San Lorenzo takes a turn for the worst, Arnold and his classmate’s only hope of getting home is retracing the dangerous path that led to Arnold's parents' disappearance.
Mason Cotton
Arnold (voice)
Benjamin Flores Jr.
Gerald (voice)
Francesca Marie Smith
Helga (voice)
Anndi McAfee
Phoebe (voice)
Carlos Alazraqui
Eduardo (voice)
Alfred Molina
La Sombra (voice)
Justin Shenkarow
Harold (voice)
Antoinette Stella
Stella (voice)
