super easy to do even with free version.
1. Create field group for the post_type (Post Type is equal to Cast and Crew)
2. create a field of type Taxonomy, select what taxonomy to use, appearance of ‘Select’
3. The new select field will now appear when editing/creating a “Cast and Crew” post
Do ACF people answer these questions? Or do they hope we just help each other. I’ve seen many questions with no responses.