Imagine being so scared of trees that you can’t even look at one, or take your son to the park. Well, Maricela has a phobia of trees that has blighted her entire life. She has no idea how it started, but she wants it to end right now - in the middle of the Mexican jungle, with Bear Grylls pushing her to confront the trees that she actually believes can kill her. Meanwhile, Mike flinches every time he sees or hears an insect flying towards him. Together, they’re about to face their fears head on.

• Bear Grylls