If your topic crosses multiple subject areas or if you want to get a broader context for your topic beyond theatre, consider exploring a non-theatre-specific database. The University of Illinois subscribes to hundreds of databases, so it can be hard to know where to start. Here are a few suggestions for getting started:
Still not sure when to look beyond your discipline? Here's an example to help you think through when your research might benefit from interdisciplinary sources. Let's say you are interested in Native American theatremaking. In addition to plays by Indigenous playwrights, what resources should you consult?
Whatever your topic, try casting a wide net and exploring how different perspectives from multiple academic disciplines might enrich your research.