Meet the renegade philosophy teacher who's not afraid to speak his mind and break the rules to revolutionize his students' lives, including the son he barely knows and a student with a severe social phobia.
Cast:Francesc Orella , Pere Ponce , Carlos Cuevas , Marta Marco , Candela Antón , Albert Baró , Elisabet Casanovas , Júlia Creus , Marcos Franz , Adrian Grösser , Iñaki Mur , Pau Poch , Assun Planas , PatrÃcia Bargalló , Victòria Pagès , Oriol Pla , Jordi MartÃnez , Anna Maria Barbany
The new school year brings a provocative new female student. When Pol doesn't return due to family pressures, Merlí has words with the teen's father.
Merlí and Coralina, the new head teacher, get off to a bad start. Marc tries to help his young brother with his behavioural and academic issues.
Joan asks Merlí for relationship advice, but Merlí gets a good tip from him instead. Tensions between Oliver and his mother reach a breaking point.
Merlí tells his mother a shameful lie. Things heat up fast between Gerard and Oksana. Finding himself attracted to his new boss, Pol confides in Bruno.
Millán tells Glòria a secret he's been hiding. Tània bravely speaks up to defend Berta in Coralina's class, but struggles to tell Marc how she feels.
When Pau is punished for throwing a pen at a mean teacher, Tània's help brings Marc closer to her. Pol and Miriam get into a heated confrontation.
When Coralina tries to get rid of a transgender substitute teacher, the students stage a protest. Marc seeks career advice from Bruno's grandmother.
Mònica gets fed up with Joan's jealousy. Gerard discovers what Oksana is busy doing every afternoon. Oliver reveals a painful memory to Merlí.
3 students decide to play a joke on Coralina, but it causes that they and two of the girls receive a punishment that at the end results in a very rewarding experience for all of them.
Coralina plants suspicion in Ivan's mind about his mother and urges Bruno to move to Rome. Joan tries to convince Mònica to change her mind.
Gina forces Gerard to face the realities of dating Oksana. Pol apologizes to Ivan. Marc brings Pau to visit their mom at work and makes a plea.
Joan decides to stop being the "nice guy" and try new things. Oliver makes an announcement to his parents. Bruno says goodbye to those closest to him.
Pol learns his brother is hiding a secret. The students sneak into the school at night and have a wild Christmas party. Karma catches up with Coralina.