This season consists of 18 episodes. Filming for the fourth season began on February 7 and ended on February 11, 2005.
On Lola's birthday, Paco decides that the Rochas go bowling, to break the record of a guy who is about to leave the country, and in the midst of boredom Lola gives the big surprise in this game. Paco feels cornered by his wife.
Kelly, in the middle of her leisure, is forced by Paco to work, she leans towards modeling, for which Paco must pay millions. The opportunity comes with the announcement of a car.
Paco, in the face of the discontent of his family, decides to go on a pleasure trip with them, however what promised laughter, songs and pleasure becomes chaos due to the bustle, traffic and even violence.
Greed invades the Rocha family, after learning that Paco saved 500,000 pesos for the festivities, so each member tries to convince him to give the money to a single person; they do not have a decent gift for Paco.
After arriving home without gifts, Paco is relegated and his family decides to go for chicken for dinner without him. Shortly after, and wishing he had not been born, Paco receives a visit from an angel who will make him reflect on the importance of family love.
After a blow to the head, Paco claims to have seen aliens, even these beings have stolen his socks. The Pachóns and his family never tire of making fun of him. Paco will do the impossible to prove that he speaks the truth.
Tired of following the rules, Kelly decides to leave the Rocha's house and seek her independence, the decision leaves some quarrels with Paco. Then, and after some memories, Paco looks for Kelly and discovers something uncomfortable.
Lola, without caring about leaving the family without eating, took a decoration course, the first place where she puts into practice what she has learned is the bathroom of the Rocha house, a fact that enerves Paco, who feels invaded and outraged.
Oscar has abandoned Amparo, in order not to feel alone she decides to stay a few days at the Rochas' house, where she will run into attempts at conquest and gambling problems. Lola gets to bet an amount of millions of pesos, which makes Paco unnerved.
The Rochas have to go to the casino to try to pay off Lola and Amparo's debt, no matter how much they try to use their tricks, the plan does not work as they expected, so Paco has to take out the caste and fight with a Herculean woman.
In the midst of a financial crisis, typical of the Rocha, and after a car accident, Paco wants to sue the owner of a car, although Kelly and Willy are responsible, but Amaro's testimony could be charitable.
On the eve of a party of students and alumni, Willy plans to take revenge on the girl who humiliated him, Gina, who attracts him a lot. On the other hand, Paco sets up a motivating speech and Amparo is still unable to weigh his loneliness.
After a few years, and in the midst of loneliness, an old love returns to Amparo's life. Both decide to pay attention to the signs of fate and begin to organize their wedding, but Paco has an observation about the groom.
The Rochas face a crossroads, Uncle Gerardo left a large fortune, but to collect it there's a specific condition, the first Rocha who has a son and gives him his name wins the inheritance. Lola is not convinced.
Kelly is presented with a great opportunity for work, to be the image of chocomenudencias, a situation that overexcites Paco. On the other hand, Willy is ready for a trip with the President, but he needs the monetary support of the Rocha.
Due to Paco's dismissal to circumstances out of his hands, Willy tells him that there is a vacancy at school as a janitor. Once there, various circumstances and memories of the past invade Paco, shame lurks Willy.
Kelly swears to have found the love of her life, it is a forty-three-year-old man, but what seemed like a barrier is now a window, all after discovering that the aforementioned is the city's counchman.
Due to a class of Kelly, Willy's masculinity suffers a 180-degree turn, the things he is dressed with wave between metrosexuality and the effeminate, the Rochas are shocked, but success looms.