So, there I was, I thought I would read up on Chris Carter's IMDB page and I came across this little tidbit. The first, about Picket Fences, I already knew, but the second, came as a bit of a surprise.
Two of his attempts for crossovers with other television shows failed for the same reasons. The first attempt was to crossover The X-Files with CBS's Picket Fences; CBS feared losing ratings to the newer network. The second attempt was to crossover with WB's Buffy the Vampire Slayer; FOX feared losing ratings to the newer network. David Kelley in the first incident and Joss Whedon in the second were on board with Chris Carter for their respective incidents.
Is this true? I thought I knew everything there was to know about The X Files, but this was the first time I ever came across this.