The main stage was filmed in two patios of the apartment of Araceli Budía, due to space and aesthetics, and had to adjust the light and color of both sites and different times of day to look like a single cell.
Rubén Trujillo Yranzo takes a real medical ID card of himself, but you can see the logo of a hospital of the Community of Madrid.
The outbreaks were light bulbs and their tripods were broomsticks, secured by the team. Because of this there were some incidents of burns on the actors.