¨Teach a scoundrel¨ or ¨enseñar a un Sinverguenza¨ deals with a cheeky, Bon Vivant named Lorenzo (José Rubio) , he is a card player who cheats at the gamble table helped by his lover (Ingrid Garbo) . Along the way , he breaks into the life of Rosana (Carmen Sevilla who was winner for her attractive performance) , a very beautiful but strict and rigorous teacher who never allows herself to do something out of place. The meeting will change the ways and attitudes of Rosana, and she'll end up madly in love with him .Director Agustín Navarro makes the film with a certain fluency and skillness from a technical point of view and develops the stagy essence just show up on the big screen. The camera movements are elegant and blending seamlessly into the action . The film doesn't offer more incentives and it tires , at times . However, we have to save the nice actress Carmen Sevilla in the scene in which all the characters dance luckily and adding the extremely gorgeous Ingrid Garbo . The atmospheric musical background accompanies the acting , but the development is irregular and some boring . In any case, and despite the disadvantages exposed, it serves to spend the time enough , turning out to be a film in which in some moments the virtues manage to prevail over the defects . Displaying a good cast, such as José Rubio as Lorenzo, he discreetly performs the character with the sympathetic cheek that he played so many times in stage but at the same time showing certain interpretive limitations and while he's really surpassed by the always wonderful Carmen Sevilla as Rosana, in fact she won National Syndicate of Spectacle, Spain 1970 Prize of the National Syndicate of Spectacle Best Female Star . As well as a fine support cast with plenty of familiar faces , such as : Ingrid Garbo, Mari Carmen Prendes, Manuel Alexandre , Tina Sáinz, Carmen Martínez Sierra , Mara Lasso , Mirta Miller's cameo , Rafael Hernández and brief appearance of the indispensable and here wasted : José Luis Coll, Luis Sánchez Polack or Tip and Coll.The picture was professional but regularly directed by Agustín Navarro. At first Navarro made some rather irrelevant slight works, then he spent a season in Argentina making the odd film : "Proceso a la conciencia" (1964) and also made some transcendent movie . He continued to try his luck with this adaptation of Alfonso Paso's work, whose lack of creative capacity was evident despite the discreet result presented for this story , which does not even have much environmental interest . Navarro directed some passable comedies as ¨Cuidado Con Las Personas Formales¨, ¨Cerro De Locos¨, ¨Casa De Los Martínez¨ and ¨De Profesión Sospechosos¨. And he also made a Western : ¨Cuatro Balazos¨1964 and a Thriller ¨El misterioso señor Van Eyck" (1966) , among others.This successful play written by prolific playwright Alfonso Paso featured a lot of representations in stage , such as : Theater (Madrid Premiere, 1967) directed by Juan Guerrero Zamora , performers: José Rubio (Lorenzo), Nuria Torray (Rosana), Antonio Vico, Carmen Carbonell, Charo Soriano. The play was on the bill for 16 years in a row, Rubio leading the cast throughout that time. Later, the role of Rosana was played by Ana María Vidal (1968), María Garralón (1975-1979), Anabel Montemayor (1980-1982) and María Rey (1982-1983). Other changes in the cast included actors such as Mary Delgado, Mercedes Aguirre or Esther Gala. In 1994 the work was replaced, again with Rubio and Vidal at the forefront of the poster. In 2006, a piece was released that continued the plot 40 years later, with the title What was the scoundrel ?, written by Rafael Mendizábal and starring José Rubio and María Kosty. And Television (May 4, 1989, in the TVE first function stage) with the following performers: José Sancho (Lorenzo), Virginia Mataix (Rosana), Pastor Serrador, Margot Cottens, Pilar Barrera.