This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
Q: There have also been many references to Doctor Who in popular culture and other science fiction, including Star Trek: The Next Generation ("The Neutral Zone") and Leverage. In the Channel 4 series Queer as Folk (created by later Doctor Who executive producer Russell T. Davies), the character of Vince was portrayed as an avid Doctor Who fan, with references appearing many times throughout in the form of clips from the programme. In a similar manner, the character of Oliver on Coupling (created and written by current show runner Steven Moffat) is portrayed as a Doctor Who collector and enthusiast. References to Doctor Who have also appeared in the young adult fantasy novels Brisingr and High Wizardry, the video game Rock Band, the soap opera EastEnders, the Adult Swim comedy show Robot Chicken, the Family Guy episodes "Blue Harvest" and "420", and the game RuneScape. It has also be referenced in Destroy All Humans! 2, by civilians in the game's variation of England, and in Apollo Justice: Ace Attorney.
A:
What Star Trek episode has a nod to Doctor Who?