 " Per Manum " premiered on the Fox network on February 18 , 2001 and was first broadcast in the United Kingdom on BBC Two on June 9 , 2002 . The episode earned a Nielsen household rating of 9 @.@ 4 , meaning that it was seen by 9 @.@ 4 % of the nation 's estimated households . It was viewed by 9 @.@ 61 million households and 16 million viewers , making it , at the time , the highest @-@ rated episode of The X @-@ Files to air during the season . " Per Manum " ranked as the 30th most @-@ watched episode for the week ending February 18 . Fox promoted the episode with the tagline " How did Scully get pregnant ? " The episode was later included on The X @-@ Files Mythology , Volume 4 – Super Soldiers , a DVD collection that contains episodes involved with the alien super soldiers arc . 
