APilgrimInNarnia has a guest post about Out of the Silent Planet.
the book with the original benevolent E.T.'s and the first CSLewis book that I ever read. It puts Christianity and life on other planets in context, making a benevolent universe where only earth is "silent" because it's guardians rebelled. (a similar context is found in L'Engle's A Wrinkle in Time, where the children rescue their father from a planet where the rebellion was complete, in contrast to earth, where some still remained true...).
the most amusing part of the book, however, is when Ransom tries to translate the bad scientist's greedy imperialist ideology etc. to the innocent Martians.
I haven't listened to the podcast, but it is part of a series that includes discussions of starwars and Japanese fantasy films too.
Apple Link for itunes