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.

• Viacom Media Networks
• Nickelodeon Animation Studio
• Mason Cotton
• Benjamin Flores Jr.
• Francesca Marie Smith
• Anndi McAfee
• Carlos Alazraqui
• Alfred Molina
• Justin Shenkarow
• Antoinette Stella