+{% comment %}
+ Find previous and next episodes (if any).
+{% endcomment %}
+{% for episode in site.episodes %}
+ {% if episode.url == page.url %}
+ {% unless forloop.first %}
+ {% assign prev_episode = prev %}
+ {% endunless %}
+ {% unless forloop.last %}
+ {% assign next_episode = site.episodes[forloop.index] %}
+ {% endunless %}
+ {% endif %}
+ {% assign prev = episode %}
+{% endfor %}
+
+{% comment %}
+ Display title and prev/next links.
+{% endcomment %}