The Boarding School (Seasons 1–7)

The Boarding School (El internado, 2007) is a Spanish mystery-thriller series from Antena 3 you can watch online on iFILM. A prestigious boarding school deep in an isolated forest takes in the children of Spain's most powerful families — and things go very wrong almost immediately. Teenager Marcos arrives with his little sister after their parents vanish without a trace; they believe the parents are still alive.

Around the same time, a woman named María sneaks into the school staff as a maid. She escaped from a psychiatric ward and is convinced her kidnapped son is somewhere on the grounds. The series runs the boarding-school thriller formula through a genuinely creepy forest-horror filter, with Ana de Armas and Blanca Suárez among the young cast before either became widely known outside Spain.

Seven seasons of slow-burn secrets kept Spanish audiences hooked for years. If you like stories where every locked door hides another question, this one delivers. Stream all seasons of The Boarding School online on iFILM.