Planet X (Star Trek) Planet X (Star Trek) Planet X () is a 1998 "Star Trek" novel by Michael Jan Friedman which is a crossover between the X-Men comic book series and the characters of "". A "New York Times" bestseller, it was a sequel to an earlier crossover, detailed in the Marvel Comics one-shot "Second Contact" (which was itself similar to an earlier "Star Trek/X-Men" crossover comic, where a slightly different team of X-Men encountered the characters of ). The novel is noteworthy for hinting at an attraction between Jean-Luc Picard and Ororo Munroe (Storm), and made a forward-looking reference to the (then
Ultimate X-Men killing Beast, who was killed when a Sentinel attacked the White House during Emma Frost's public disclosure of her school. This made Beast the first dead Ultimate X-Man. As a side note, "Ultimate X-Men" #40 features what Marvel claims to be the first marriage proposal in a comic book letters column, which is answered in "Ultimate X-Men" #44 with a positive response. The third "Ultimate X-Men" writer was Brian K. Vaughan, best known at the time for his work on "". His run was marked by the relative absence of Wolverine as the main character and the re-imagining of second-string