Niv Sultan, who plays Tamar, studied and learnt Persian for four months. She also learnt "Krav Maga", Israeli self-defence.
Almost all the cast are of Iranian-Jewish descent, with the exception of Navid Neghaban and Qais Khan, who is Afghan.
In season 2, Glenn Close faced a major challenge having to learn to speak Farsi, a Western Iranian language.
Moshe Zonder, the head writer on this series, was also involved with the earlier acclaimed
Fauda (2015).
One of the cars Peyman drives is a Fisker Karma which is an electric car, however, in the scenes where it is being driven you can hear engine and loud exhaust sounds indicating it is a noisy sports car which it is not, the car is very quiet and has a distinct 'space car' sound.