There are multiple episodes, but its a new weekly segment where they go back and critique sub-genres of the original "metal family tree" that he made a good number of errors on in the original Metal: A Headbanger's Journey. Here are my two favorites so far.
(Yes, Candlemass is Doom)
				
			(Yes, Candlemass is Doom)
 
	 
	 
 
		 
 
		 
 
		