Despite his prominent billing with the rest of the cast in the film's trailer and poster, Billy Crudup only provides a voice-over narration.

Justin Chatwin performed his own stunts. He is a motorcycle and extreme sports enthusiast in real life.

Josh Hutcherson and Kaya Scodelario were in 2017 attached to play the lead roles, but dropped out because of the delays.

Helen Hunt was attached to play Nancy Gibbon, but she eventually dropped out.

Zac Efron was attached to star in the film during its development process, back in 2010.