X-Files Alien Baby in Jar. By its third season, The X-Files had grown from a cult hit to a global phenomenon, becoming the #1 show in numerous countries and making paranoia fun again. Featured is an alien fetus prop from the classic episode "The Erlenmeyer Flask", the cliffhanger finale to the series' first season and a pivotal episode that set the tone for the remainder of the series. The prop is 6.5" tall, 3.5" in diameter, and kinda gross. It is in Excellent condition, and still in its original slime.