We analyse the role of a theatrical script and its relation to the literary work and the theatrical performance. We put forward an Argument from Modality, which demonstrates structural and functional differences between literary works and theatrical scripts. Next, we answer some potential challenges to our argument. We demonstrate that the failure to realize the far-reaching consequences of a clear distinction between the literary work and the theatrical script is a source of confusion in the debate on the relata of the relation of interpretation. In particular, we show that the relation of interpretation does not hold directly between the literary work and the theatrical performance. It is mediated by the script. The script interprets the literary work by filling in its places of indeterminacy and adjusting it for stage purposes. Moreover, the script, which is a set of instructions, is executed rather than interpreted in a theatrical performance.