Héctor Manuel Vidal's training in stage arts began at the school of the group Club de Teatro, in which he performed in over 40 plays.

From these premieres, and given their topics, theater critics recognized Vidal's ability to choose the most appropriate works and themes for the socio-political context of his country.

Another important work in his career as a theater director was Breaking the Code by Hugh Whitemore, about the life of Alan Turing, with more than 300 performances.

[1] In his more than four decades as a theater director, he also directed works by Ramón del Valle-Inclán, Maurice Maeterlinck, Shakespeare, Henry Miller, and Jean-Luc Lagarce, among others.

Before the 1973 coup d'état he wrote for the newspaper El Popular [es], a party press organ, and its political humor supplement Misia Dura.