Relaciones peligrosas (English: Dangerous Affairs), originally known as Física o Química (Physics or Chemistry), is an American Spanish-language telenovela produced by Telemundo Studios, Miami. It is an adaptation of the Spanish television series Física o Química.^[1] Starring Sandra Echeverría, Gabriel Coronel, Maritza Bustamante, Jonathan Freudman, Carlos Ferro, Daniela Navarro, Renato Rossini, Gonzalo García Vivanco and in the leading roles of the plot.

From January 24^[2] to June 25, 2012, Telemundo aired Relaciones Peligrosas weeknights at 10pm/9c during the 2012 season, replacing La Casa de al Lado. As with most of its other telenovelas, the network broadcast English subtitles as closed captions on CC3.

Set in modern times, Dangerous Affairs delves into the difficult and often conflict-filled relationships between teenagers, their parents and teachers at a bilingual high school (Cervantes Academy School of Arts). Everything begins with the story of Miranda Cruz (Sandra Echeverría), a beautiful young woman who begins an affair with Mauricio, her student, while a teacher in this institution. In her world, the hidden truths that many adults try to avoid are revealed: love relationships that are prohibited, discriminated or judged that can turn into a real-world nightmare.

Though Relaciones Peligrosas was nominated for Favorite Lead Actor, The Best Bad Boy, Best Supporting Actor and Actress, The Perfect Couple, and The Best Kiss,;^[3][4] it did not win any awards.^[5][6]