As a freelance writer, Sagan pitched a number of ideas to the Star Trek writing staff in the early 1990s, resulting in an invitation to write for Star Trek: The Next Generation during its final season. In an interview for Star Trek Monthly issue 29, pp. 25, Sagan expressed the hope that he would be invited to write for one or more of the spin-off series; this hope came to fruition in 1998 , when he was brought onto the writing staff for Star Trek: Voyager, serving as Story Editor for the show's fifth season.