Spanish television drama thriller focusing on the students of a fictional boarding school in a forest, where teenagers are sent by their parents to study. The boarding school is situated in a forest far from the city, on the outskirts on which macabre events occur. The series debut on 24 May 2007, and is a production of Antena 3. Although the show is recorded and produced in HD, it is only broadcast in SD. However, an HD Blu-ray Disc release has been announced
　　Héctor de la Vega - Luis Merlo
　　Elsa Fernández Campos - Natalia Millán
　　Jacinta García - Amparo Baró, Carolina Lapausa
　　María Almagro - Marta Torné
　　Marcos Novoa Pazos - Marti?o Rivas
　　Iván Noiret León - Yon González
　　Carolina Leal - Ana Celia de Armas
　　Victoria Martínez González - Elena Furiase
　　Roque Sánchez Navas - Daniel Retuerta
　　Cayetano Montero Ruiz - Fernando Tielve, Roger Príncep
　　Fermín de Pablo / Carlos Almansa - Raúl Fernández
　　Hugo - Javier Ríos
　　Camilo - Pedro Civera
　　Amelia - Marta Hazas
　　Pedro - Eduardo Velasco
　　Paula Novoa Pazos / Irene Espi / Eva Wulf - Carlota García
　　Evelyn - Denisse Pe?acock
　　Mateo Tabuenca - Alejandro Botto
　　Jacques Noiret - Carlos Leal
　　Nora - Mariona Ribas
　　Joaquín Fernández - Eduardo McGregor
　　"The gnome" - Javier Iribarren, Roger Príncep
　　Irene Espí / Sandra Pazos - Yolanda Arestegui
　　"The old man" - Manuel de Blas
　　Andrés Novoa - Luis Mottola
　　Rebeca Benarroch - Irene Montalá
　　Miguel - Eduardo Espinilla
　　Julia - Blanca Suárez
　　Alfonso Ceballos - Paco Merino
　　Ricardo Montoya - Miguel Alcíbar
　　Mario Torres - José Luis Pati?o
　　Susana Saavedra / López - Chusa Barbero
　　Antonio - Manuel Jurado
　　Julia's Mother - ?ngels Bassas
　　Manuela Portillo - ?rsula Corberó
　　Verónica Fernández García - Lucía Quintana
　　Martín - Oriol Tarrasón
　　Márquez - Bruno Squarcia
　　Rodrigo - Pablo Castellanos
　　?ngel Lázaro Díaz "Juan" - Quim Ramos
　　Julia's Father - Carlos Olaya
　　Mary - Violeta Pérez
　　Evelyn's Mother - Lucina Gil
　　Evelyn's Father - Jesús Fuente
　　Gerardo - ?lex Quiroga
　　Vicky's Mother - Lolita Flores
　　Martin Moreno Rodriguez/Emilio Galvan - Ismael Martinez
　　Amaia - Nani Jimenez