Trivia

Pablo Rosso, the camera from the original [REC] (2007), returns this time as the SWAT member Rosso.

A lot of the zombie shrieking was added in at post-production stage. To shoot with numerous actors shrieking constantly would have meant that all the dialog would have been drowned out. Adding it in afterward meant that the sound technicians could manipulate the noise to its best advantage.

The SWAT team, police and crowd of onlookers outside the building were real people, not actors.

In the first film, the cameraman's name was Pablo, while in this film, the cameraman is called Rosso. The same actor, Pablo Rosso, portrayed both characters.

The actors playing the Special Forces team were given a day's intensive training in how to handle firearms.

Paco Plaza, Jaume Balagueró: dubbed voices of some of the infected people.