The X-Files - Season 1 Episode 24 The Erlenmeyer Flask The truth is out there.
Overview: When Deep Throat points out a news story about a fugitive who apparently drowned, Mulder and Scully cannot see what makes the case special but follow it up anyway. With Deep Throat's insistence, they discover evidence of a secret government project code-named Purity Control, which uses human test subjects and infects them with extraterrestrial DNA. However, the evidence and everyone who has seen it is quickly being eliminated.
Comment
I can't believe I'm the only idiot writing an X-Files review here. Anyway, I still don't understand Piper Maru, it was a good episode but not really worth the praise it gets, and let's be honest, the Monster of the Week episodes were always better than the Mytharc ones... ... mostly better. There was were some pretty darn good mythology episodes, and there were ones like Piper Maru that were OK but not great. It was probably the ultimate television drama and an influence to everyone that wanted to achieve greatness on the small screen. It really showed what you could do with a one hour time slot and we were all blessed to have this done, not only because it was done so well, acted so well, and written in a way that invested the audience, but because it pathed the way for people that wanted to achieve that level of greatness. Television got better because of the X-Files, movies got better... and then politics came and it all sucks now, but for a little while, the X-Files raised the bar for everything.