Alguien esta en la puerta
- Tahun: 1970
- Negara: Mexico
- Genre: Thriller
- Studio: Salto de Fe Films, Mr. Blue
- Kata kunci: adultery, love triangle, female friendship, sexual repression, sexual desire, high school reunion, classmates, affair
- Pengarah: Adrián García Bogliano
- Pelakon: Alexis Cárdenas, Samantha Coronel, Mauro Sánchez Navarro, Giancarlo Ruiz
