Fall UPN Premier Dates July 15, 2002 AICN has all of the premier dates for the fall seasons of UPN shows right over here. We’ve got Enterprise and The Twilight Zone on September 18, and Buffy and The Haunted on Sept. 24. Share this:Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)