Which item is essential for a theatrical company to provide to a venue prior to the show?

The technical rider is an essential document for a theatrical company to provide to a venue prior to the show because it outlines all the technical requirements needed for a successful performance. This includes information about sound and lighting equipment, stage specifications, set design details, and any special effects that may be used. By providing a technical rider, the production ensures that the venue can accommodate its technical needs, thus facilitating a smoother rehearsal and performance process.

While a costume list and stage layout are important, they do not cover the comprehensive technical aspects that directly impact the production's quality. Similarly, a marketing plan is vital for promoting the show and attracting an audience, but it does not pertain to the logistical and technical arrangement necessary for the actual performance. Therefore, the technical rider stands out as the crucial component for ensuring all technical details are explicitly communicated and handled prior to the show.