This isn't exactly an adaptation, but it fits best here. There is a new Narnia Podcast series running which started this week. Each week, there will be a podcast on one of The Chronicles.

Each podcast includes the following sections:
- The Story Behind the Story
- Short Summary of the Book
- Favorite Characters Discussion
- Unique Aspects of this Story
- General Discussion (a variety of questions related to the book)

The shows will be hosted by William O’Flaherty, Paul Martin and Dr. Crystal Hurd along with different guest hosts.

Here's a link to the website where you can listen to it
http://narniacast.mymiddleearth.com/

I've listened to the first one and it's quite good (I detected one minor mistake in the summary 😉 ). It's about 40 minutes.

Here's a place to discuss what you think of it.

(Narnia Cast and My Middle Earth Network are not associated with TLC)