Tintin et les Picaros (1976)

Tintin hears in the news that Bianca Castafiore, her maid Irma, pianist Igor Wagner, and Thomson and Thompson have been imprisoned in San Theodoros for allegedly attempting to overthrow the military dictatorship of General Tapioca, who has yet again deposed Tintin's old friend, General Alcazar. Tintin, Calculus, and Haddock soon are accused themselves and, travelling to San Theodoros to clear their names , find themselves caught in a trap laid by their old enemy, Colonel Sponsz, who has been sent by the Eastern Bloc nation of Borduria to assist Tapioca. Sponsz has concocted the conspiracy of which Tintin and his friends are accused in a plot to wreak revenge upon them for humiliating him in The Calculus Affair. Escaping, Tintin, Haddock, and Calculus join Alcazar and his small band of guerrillas, the Picaros, in the jungle near a village of the Arumbaya people.

Meanwhile, in a show trial orchestrated by Sponsz, Castafiore is sentenced to life in prison and the Thompsons are ordered to be executed by a firing squad. All three show great contempt at the injustice of the proceedings. Tintin enlists Alcazar's help in freeing his friends, but upon arrival at his jungle headquarters, finds that Alcazar's men have become corrupt drunkards since Tapioca started dropping copious quantities of alcohol near their camp. Additionally, Alcazar is continually henpecked by his shrewish wife, Peggy, who nags him constantly about his failure to achieve a successful revolution. Fortunately, Calculus has invented a pill that makes alcohol disgusting to anyone who ingests it (which he proves to have tested on Haddock, much to the latter's annoyance). Tintin offers to use the pill to cure the Picaros of their alcoholism if Alcazar agrees to refrain from killing Tapioca and his men. Alcazar reluctantly agrees. Moments after his men are cured, Jolyon Wagg arrives with his musical troupe the Jolly Follies, who intend to perform at the upcoming carnival in San Theodoros. Alcazar, with a little advice from Tintin, launches an assault on Tapioca's palace during the carnival by 'borrowing' the troupe's costumes and sneaking his men into the capital. He topples Tapioca, but on Tintin's urging, does not execute him, as is the tradition. Tapioca is instead forced to publicly surrender his powers to Alcazar, and is banished, while a disappointed Sponsz is sent back to Borduria.

Meanwhile, Thomson and Thompson are due to be shot on the same day as the carnival. Although as naive as ever in their observations, the detectives show courage by refusing to be blindfolded. Tintin and Haddock reach the state prison in time to prevent the executions from occurring. Castafiore, her maid, and her pianist are also released, and Alcazar can finally give his wife the palace he has promised. With all matters resolved, Tintin and his friends leave. As they fly home, Tintin and Haddock express gratitude about being able to go home.

The second-to-last panel shows a final, skeptical political message: as under Tapioca, the city slums are filled with wretched, starving people and patrolled by apathetic police. Nothing has changed, except the police uniforms and a Viva Tapioca sign that has been changed to read Viva Alcazar.