In a Mirror, Darkly (1) - S4-E18
Trivia: In the opening scene of this episode (S4E18), footage from the 1996 movie "Star Trek: First Contact" was ingeniously intercut with new footage to create a startling revision that is still a Star Trek fan favorite to this day. Actors James Cromwell (Zefram Cochrane) and Cully Fredricksen (the Vulcan emissary) shot the original scene for the film "First Contact" in 1995. When the TV series "Star Trek: Enterprise" recycled the movie footage 10 years later, both Cromwell and Fredricksen received a day's pay for appearing as extras in this TV episode (about $120 for a day's work in 2005), even though they never physically appeared on the "Enterprise" set.
Answer: While ratings did drop, there was a lot going on to cause the rating drops and cancellation. First, "Enterprise" was on UPN, which was dissolved a year after the show was cancelled. At the time of cancellation, it was UPN's highest rated drama. Because they were on at night, they were often preempted by local UPN broadcast of baseball games. And it wasn't even aired in every market. They also lost a major corporate backer early and it was difficult for them to over come that loss. Plus, for season 4, they switched to a Friday night line up, so they were competing against Fox shows, like "The Simpsons" whereas on Wednesdays they didn't have much competition.
Bishop73