He worked with his brother and David Lynch on the Twin Peaks television series, writing two episodes.
[1] He wrote episode 1.4 of the little-seen On the Air television series for Lynch and his brother, although the episode was never aired in the United States.
In the early 1990s, he wrote the script for the mystery/thriller TV movie Past Tense with Miguel Tejada-Flores.
Frost's first novel, The Autobiography of FBI Agent Dale Cooper, was based on the Twin Peaks character played by Kyle MacLachlan.
More recently, he has written a mystery/thriller series based on a character named Alex Delillo,[2] a Pasadena homicide detective and single mother.