International audienceThis paper analyzes, through two experiments theatre intervention in Salvador and Rio de Janeiro, the political power of a theatre that is openly declared to the spectators as theatre, despite using from time to time, the method of invisibility started by Augusto Boal in the seventies. The theater intervention in train and bus today is a legacy of the Invisible Theatre but also of Epic Theatre and Performance Legacy. Will this theatre be as political as its precursor despite the changing times? What is the range of action of the spectator in these new forms? What is the freedom of speech of the companies in Brazilian democracy knowing that it depends on sponsors or goodwill of the passenger? By the way both companies a...