Director Simon Fitzmaurice wrote the script when he was diagnosed with motor neuron disease - and directed the film entirely through eye-recognition software.
The brief shot near the beginning of the film of Robert leading a crew of people into the sea naked was done as a charity promotion. Inspired by the Ice Bucket Challenge, the stunt was promoted as 'The Ultimate Ice Bucket Challenge'. One hundred people turned up on the day to run into the sea naked, which they all did for free. Actor Michael Smiley also appeared nude and took part. Evanna Lynch did not take part but was still there on set reportedly really enjoying getting an eye full of several naked men. She posed for photos with the naked group and said before filming began, "today is going to be a FUN day at work."
The building used as the set for the mental hospital was actually a school in Rathnew, Co. Wicklow. The same building was used for the scenes where Robert is teaching at a community college.
James Vincent Mcmorrow wrote and performed an original song for the film.
Emily loses her boots when she jumps into the sea.