angrybrad

 <input type="{{ interestedin.value }}" value="checked" name="fields[interests][]" {% if checked %}checked="checked"{% endif %}>

angrybrad

<ul>
  {% set alreadyUsedTags = [] %}

  {% for entry in craft.entries.section('databytes').limit(null).find() %}
    {% set series = entry.series %}
 
    {% if series | length %}
      {# What do I add to this for loop to just display the first entry that has the same tag? #}
      {% for series in series %}
        {% if series not in alreadyUsedTags %}

angrybrad

Loop through your Matrix blocks.
{% for block in entry.matrixField %}

  Find the block you're looking for.
  {% if block.type == 'myBlockHandle' %}
  
    Make sure there are actually some images/assets select
    {% if block.myAssetField | length %}
    
      Loop through the assets