--- a/schema.org/ext/tvradio.html	Tue Dec 11 11:43:50 2012 +0000
+++ b/schema.org/ext/tvradio.html	Tue Dec 11 11:58:58 2012 +0000
@@ -19,11 +19,63 @@
 
   <p>See <a href="http://www.w3.org/wiki/TVRadioSchema">Wiki overview</a>.</p>
 
+    <!-- Main programme types -->
+
     <div typeof="rdfs:Class" resource="http://schema.org/Episode">
       <span class="h" property="rdfs:label">Episode</span>
-      <span property="rdfs:comment">A body of structured information describing some topic(s) of interest.</span>
+      <span property="rdfs:comment">A TV or radio episode which can be part of a series or season.</span>
       <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/CreativeWork">CreativeWork</a></span>
     </div>
 
+    <div typeof="rdfs:Class" resource="http://schema.org/Season">
+      <span class="h" property="rdfs:label">Season</span>
+      <span property="rdfs:comment">A TV or radio season.</span>
+      <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/CreativeWork">CreativeWork</a></span>
+    </div>
+
+    <div typeof="rdfs:Class" resource="http://schema.org/Series">
+      <span class="h" property="rdfs:label">Series</span>
+      <span property="rdfs:comment">A TV or radio series.</span>
+      <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/CreativeWork">CreativeWork</a></span>
+    </div>
+
+    <!-- Sub-types for radio and TV programmes -->
+
+    <div typeof="rdfs:Class" resource="http://schema.org/TVEpisode">
+      <span class="h" property="rdfs:label">TV episode</span>
+      <span property="rdfs:comment">A TV episode which can be part of a series or season.</span>
+      <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Episode">Episode</a></span>
+    </div>
+
+    <div typeof="rdfs:Class" resource="http://schema.org/TVSeason">
+      <span class="h" property="rdfs:label">TV season</span>
+      <span property="rdfs:comment">A TV season.</span>
+      <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Season">Season</a></span>
+    </div>
+
+    <div typeof="rdfs:Class" resource="http://schema.org/TVSeries">
+      <span class="h" property="rdfs:label">TV series</span>
+      <span property="rdfs:comment">A TV series.</span>
+      <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Series">Series</a></span>
+    </div>
+
+    <div typeof="rdfs:Class" resource="http://schema.org/RadioEpisode">
+      <span class="h" property="rdfs:label">Radio episode</span>
+      <span property="rdfs:comment">A radio episode which can be part of a series or season.</span>
+      <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Episode">Episode</a></span>
+    </div>
+
+    <div typeof="rdfs:Class" resource="http://schema.org/RadioSeason">
+      <span class="h" property="rdfs:label">Radio season</span>
+      <span property="rdfs:comment">A radio season.</span>
+      <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Season">Season</a></span>
+    </div>
+
+    <div typeof="rdfs:Class" resource="http://schema.org/RadioSeries">
+      <span class="h" property="rdfs:label">Radio series</span>
+      <span property="rdfs:comment">A radio series.</span>
+      <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Series">Series</a></span>
+    </div>
+
   </body>
 </html>