The 16th season started airing on September 13, 2015, on Telecinco with Mercedes Milá hosting the main live shows or "Galas".
In case a competitor reveals voluntarily his secret, they will lose €100,000 of the final prize.
In the second week, Sabrina Salerno introduced a medal at the house to play the game of immunity.
The organization of Gran Hermano revealed that these medals were a clue to discover another secret.
On the Internet photos of Amanda as triple jump champion began to appear.
During the first week, appeared on the Internet several Aritz social networks, as well as his personal blog.
He entered the house on Day One right after his girlfriend Ivy, who was unaware she would also join the competition, along with their dog Hito.
Carlos' prize will be reduced in €100,000 in case he wins as a punishment for hinting his secret.
While she aspires to become a professional model, she takes hairdressing and make up courses and she is also a horsewoman.
During the second gala, Mercedes Milà revealed to the contestants that someone inside the House was able to see ghosts.
A single man, he considers himself romantic, home-loving, honest, distrustful and stubborn.
In the following weeks, the program revealed that there was a competitor who was considered to be expert in Big Brother.
In the last assembly of the secrets, Enrique confessed that he was the expert and that he had watched Big Brother of Spain and of other countries.
He tried to return to the contest and he lived in the apartment with Mayte, Raquel and Muti until he was eliminated as a third option chosen by the audience.
Han Wang is a Chinese-born 21-year-old student living in Armilla, Granada with his family, who runs a bazaar store.
After the competition, she wants to move to Australia, where her mother lives, together with her boyfriend Carlos and their dog Ito.
María Teresa (Maite) Galdeano Marañón is a 46-year-old bus driver from Pamplona.
Divorced for the last 12 years and a mother of three, she entered the house on Day One along with her daughter Sofía.
She tried to return to the contest and she lived in the apartment with Enrique, Raquel and Muti until she was eliminated as a second option chosen by the audience.
Marina Landaluce Rodríguez is a 28-year-old administrative assistant from Motilla del Palancar, Cuenca.
She apparently entered the house with her 1 month old baby Juan, who would stay in an adjacent camera-less room with a babysitter so that she could visit him when needed.
She was surprised to learn she would become a housemate while she was covering the press conference to present the season just days before the competition began.
Marta' prize will be reduced in €100,000 in case she wins as a punishment for hinting her secret.
Muti Orellana Felipe is a Senegalese origin 22-year-old baker from Seville who works in the family business.
When she entered the house on Day One, she was told one of the two ways to get into the "secret garden", a room that must remain unknown to most of the housemates.
She guessed that Mayte and Suso weren't mother and son in week 1.
When she entered the house on Day One, she was told one of the two ways to get into the "secret garden", a room that must remain unknown to most of the housemates.
He entered the house on Day 40, and his secret was that he knows the existence of the apartment, where Raquel, Enrique, Mayte and Muti were living.
He affirms he is seducer of women and wants to win the prize to start Penitentiary Social Assistance studies.
He wants to win the prize to aid his family economically and start Social Integration studies.