The article deals with the concept of intermediality and the possibilities of its application to experimental theatre productions of contemporary directors – R. Castellucci, C. Luppa, and R. Lepage. The problematisation of intermediality in theatre implies an analysis of the effects arising in the process of interaction between theatre as a media and modern media technologies, in particular, video materials and media installations, which represent an independent reality, the peculiarities of the functioning of which significantly transform the stage action. The relevance of addressing the concept of intermediality and its possibilities is conditioned by the tendency of contemporary theatre productions to blur genre boundaries and media specificity through the introduction of experiments based on the interaction and exchange of elements characteristic of theatre, performance and media technologies. Examining the stage works of contemporary directors allows us to demonstrate the transformation of media-specific conventions and the formation of new aspects of perception and the experience of presence through a unique sense of space and time. The author comes to the conclusion that the perception of media synthesis in intermedial theatre productions is not so much related to harmony, complementation, but rather carries ambiguity, difference, incoherence, and thus is consistent with the features of theatrical actions considered in the discourse devoted to performativity and postdramatic theatre.