Shared with you
Seth Rogen later revealed that he once asked network executive Garth Ancier why he had canceled the show. Ancier told him that due to the show's poor ratings, he had given showrunner Judd Apatow instructions on how to improve the show's success. One of these included giving the characters a victory at the end of an episode. Since this was exactly the opposite of what Apatow had set out to do, he refused to implement this change. The ratings remained bad for the remainder of the series, and the network subsequently canceled the show after one season.
Series producer Judd Apatow told Vanity Fair in 2012 that whenever he sees an opportunity to use anyone from the show, he does. It is his way of refusing to accept that the show was cancelled, and that all of his subsequent movies are the continuous adventures of those characters.
The creators were determined not to end each show with a typical "happy ending". One notable exception is the pilot episode, which the creators purposely wrote as a self-contained story, in case the show was never picked up for production.
The actors improvised lines in many of the scenes to achieve a sense of reality.