The link below will take you to an April 9, 2018 lecture that Bradbury scholar Jonathan Eller gave at Wheaton College's Marion E. Wade Center, in Wheaton, Illinois. Its title was "That High Truth: Ray Bradbury and the Influences of C.S. Lewis, Charles Williams and G.K. Chesterton":

https://www.youtube.com/watch?v=zCF6wAa50F4