On why he did the movie, Idris Elba stated: "I come from an era where these sort of films were the norm, like high-anxiety, 'Run, chase, run, chase, look out, look behind you!' This was an opportunity for me to make a film like that. I've done thrillers before, but this was the first time it involved this cat-and-mouse aspect to it. I was really intrigued by the family dynamic, the daughters, the nature of grief, this doctor who's essentially someone that's composed and tries not to panic, found himself doing just that," Elba tells Complex about the survival thriller directed by Baltasar Kormákur. "I just love the script. I love Baltasar, the director. I wanted to work with him. He's made some really incredible survivor movies, and I just wanted to get his take on what this might be like."
Idris Elba's daughter auditioned for a role in this film and was ultimately unsuccessful.
The lioness "Nandi" name means, "happy, joy, and satisfaction".
Nates wife's name was, "Amahle'' which in Zulu means "The Beautiful One".
Shooting occurred in the rural provinces of Limpopo and Northern Cape, as well as in Cape Town.