Need Help Getting the Category for Current Archive

Hello, folks.

My issue is as follow:

https://www.tvovermind.com/category/tv-news

You see that the template reports “Archive for the ‘TV News’ Category”

And the code doing that is:

<h4 class="pagetitle">Archive for the ‘<?php single_cat_title(); ?>’ Category</h4>

However, I cannot get the information from single_cat_title(); into a variable. single_cat_title(); as you know echos the result. I tried:

$category = get_the_category();
echo $category[0]->cat_name;

But it gave me the category for the first post listed in the archive, instead of the category for the archive itself.

I need to be able to get the name of the category that the archive is displaying into a variable. Any ideas?