The topic may well have links to other topics: use the 'Location' link in the overviews section.
The episodes build on earlier episodes. So you'd be well advised to have had a good look at the Physics Narrative and the Teaching and Learning Issues for each episode before pressing on.
The threads (Physics Narrative, Teaching and Learning Issues and Teaching Approaches) develop through a series of nuggets, so again, any perplexity within an episode may well be solved by stepping back through the material.
The nuggets are bite-sized, to chew on.
PDF versions of the resources are also available : use these links.