Rod Serling wrote a two-part script for episodes one and two of a Planet of the Apes TV series. The earliest dated TV script was "A Fallen God", from March 2, 1973, and the production codes on the scripts seem to suggest this was written soon after Serling's script - both follow a 'series concept' outline featuring Virdon, Kovak and Galen. Serling's script was a peculiar mixture of the TV concept, a very early script written by him for the original movie, and the plot of the second movie. It is significantly different to the filmed episode, although it does set up the series scenario in line with the concept, and some of the ideas were carried over into Art Wallace's script for Escape from Tomorrow. The plot concerned Virdon and Kovak landing on a mysterious planet after a period of suspen