In the Victorian period the theatre was dominated by actor-managers and there are a lot of text were cut or changed to suit Victorian tastes and morals.
Also popular were melodramas (highly schematic plays with superficial characters and absurd plot in which good triumphed over evil and there was a moralistic view of life).
Very important is the music hall, a number of sketches, based on the double meaning. There was the influence of Chaplin and Laurel (for Cinema), and of Beckett (for Theatre).
One of the most important innovation of Victorian theatre was the Victorian playhouse. The stages of Victorian playhouses extended back from the auditorium into a proscenium arch which was illuminated by a gaslight. The new playhouses inspired a more realistic theatre which made more use of action, movement and setting.