Post Navigation Question

I use a post navigation code in my sidebar it is as follows.

<?php previous_post_link(‘%link’, ‘Previous Episode’, TRUE); ?>
<?php next_post_link(‘%link’, ‘Next Episode’, TRUE); ?>

What I want to do is change the ‘Previous Episode’ and ‘Next Episode’ titles to the code that is necessary to actually pull the next and previous episode post title. I want the actual titles in my posts to show instead of the text that I wrote there. If anyone knows please let me know.

Thanks