Complex sentence: Rachel was mentioned in a two-part episode of "The X-Files" entitled "Dreamland", in which a secret agent aware of the hidden backstory of the show, played by Michael McKean, resided in the town.
Split into simpler sentences: Rachel was mentioned in a two-part episode of "The X-Files" entitled "Dreamland". In that episode a secret agent aware of the hidden backstory of the show, played by Michael McKean, resided in the town.