How to Access Field from Custom Taxonomy

I have a custom taxonomy (sermon-series).

I’ve created taxonomy-sermon-series.php to replace the archive.php file for this taxonomy.

The archive returns a list of the sermons within a sermons-series.

The sermon-series has a field for the sermon-series-image.

I want to use the sermon-series at the top of the archive, but am unsure how to access it.

I see:
the_archive_title()
the_archive_description()

But neither of these let me access the sermon-series-image, I’m thinking I need something like this:

$sermon-series-image = sermon-series->sermon-series-image;

Any ideas?

Thanks,
Dave