A whole team of special effects and make up experts were on standby if a survivor was caught. They were called the 'Death Squad Unit'. After each eliminated contestant had calmed down, they filmed their death scene. There are five distinct phases: the capture, the bring down, the struggle, the moment of death and the feast.
Over 200 litres of fake blood was used and was fundamentally golden syrup and raspberry sauce. The crew also had a wide array of limbs, organs and body tissue all supplied by special effects company, Artem.
The zombie cast were all put through workshops on how to move, sound, get up, keep warm, catch survivors and how to play the games safely. They were cast for different elements within the series - crawling zombies, blind zombies, chained zombies. They had to do a lot of standing around in the cold.
73 zombies were cast in Scotland.
This is the first reality series where contestants are eliminated by being killed.