"The Journal" is a two-part episode of the American animated television series Hey Arnold!
Arnold finds his father's journal in the attic of the boarding house that describes the adventures of his parents in the jungle of San Lorenzo, their marriage, Arnold's birth, and other details of their life.
On the final page, it contains a map showing where they had to go after they left him to deliver medicine to the people of the jungle.
[3] Bartlett described the decision to end the episode on a cliffhanger was meant to act as a dare directed at Paramount Pictures who were considering producing a follow-up to the episode that would also act as a sequel to Hey Arnold!
However, after the theatrical film failed to meet box office expectations, the studio made the decision to cancel the film, leaving the questions posed by the episode unresolved for over a decade until The Jungle Movie was released in 2017.