Planer voiced Frodo in "The Adventures of Tom Bombadil" from the 1992 radio series "Tales from the Perilous Realm". He was a narrator in a direct-to-video version of Val Biro's "Gumdrop" book series in 1994. He also narrated two short surreal monologues on the album "In A Strange Slumber", by Dodson and Fogg, Chris Wade's progressive folk rock project. 