Sergio Ciscar

 is a character in the Spanish crime drama limited series Muted. He is portrayed by Arón Piper.

Biography
Sergio is the son of Blanca Polo, a psychiatrist. He is very intelligent with a IQ of 154. As soon as his mother realised Sergio's talent, she focused on his education, but something went wrong almost immediately. Sergio alternated academic success with a progressive emotional detachment from his family.

On March 23, 2016, Sergio Ciscar murdered his parents by pushing them off the balcony of their apartment.

6 years later, on April 16, 2022, Sergio is released 9 months early for good behaviour, as he worked on a greenhouse while in prison. He returns to his parent's house, which he inherited, despite murdering them.

After his release from prison, Sergio is secretly monitored by a team of psychiatrists, led by Ana Dussuel, who want to determine his threat to society. They watch him from hidden cameras in his apartment and public CCTV. They also follow him. They monitor him daily and do behaviour analysis.

Sergio has selective mutism. He is religious and Natanael, an evangelical priest, is one of the few people he speaks to.

Appearances

 * Muted