Several authors have been speculating about the influence of “TV Justiça” in the decision-making process of STF. In the same direction, the court’s own judges have attributed certain effects on the argumentative behavior of the court to the telecasting of the court’s plenary sessions. In general, there is a high degree of agreement with propositions such as: “Beginning with the session’s telecasting, judge’s opinions became longer” and “Excessive exposure of the debate cause it to be less candid”. The purpose of this paper is to present new empirical evidence about the effects of “TV Justiça” in order to evaluate previous statements about it in the literature. At the most basic level, we need to know if “TV Justiça” have or haven’t made a difference over the judge’s deliberative behavior. Our results indicate that there is, in fact, a relationship between plenary session’s telecasting and an increase in the decision’s length in pages. In a similar way, telecasting seems to have increased the extension of the oral debates they engage in among themselves. Finally, analysis involving linear regression models indicates that the results holds even when controlling for other factors that seem to have effects on these variables.