In one episode, Tim and Mike hit a cyclist in their van and the writers parody a similar scene in The Sixth Sense (1999), where Cole sees the victim of a road accident by his car window. In this episode, the bicyclist is played by Olivia Williams, who also starred in The Sixth Sense (1999).
Peter Serafinowicz who appears in several episodes as Tim's arch nemesis Duane Benzie, provided the voice of Darth Maul in Star Wars: Episode I - The Phantom Menace (1999). In the series, he uses a voice very similar to that used for Darth Maul, and in one episode even paraphrases one of his lines from Star Wars. Amusingly, from the second series onward, Tim's hatred of Duane is matched only by his hatred of Star Wars: Episode I - The Phantom Menace (1999).
The opening of episode 1.7 was originally intended to feature Tim having a conversation with a fictional character. Originally, this was intended to be Lara Croft, the heroine of the 'Tomb Raider' video game series, but the writers were not granted clearance to use the character. The scene was reworked to feature FBI agent Dana Scully of the TV show "The X Files" (1993) and the producers had even considered approaching Gillian Anderson, (Dana Scully), to fill the role, but the scene was eventually filmed with a lookalike. Writer and star 'Jessica Stevenson' was going to dub the voice of Scully, but the scene was cut and never completed.
The time shown on Brian's alarm clock at the beginning of episode 1.6 is 11:21, a number featured regularly in the TV show "The X Files" (1993).
Episode 1.3, "Art", features Tim (Simon Pegg) playing Resident Evil for 24 hours straight, having taken speed the night before. This later leads him to hallucinate that zombies are attacking everyone, which in turn led to the inspiration for the movie Shaun of the Dead (2004).
The scene in episode 1.5 where Tim, Daisy and Brian watch the original Star Wars trilogy features the Ewoks' song from the end of the original version of Star Wars: Episode VI - Return of the Jedi (1983), heard off-screen. The show's producers were unable to obtain permission to use the actual music, so Simon Pegg wrote down the entire song's lyrics from memory and then performed it with Edgar Wright and 'Nick Frost'.
The name of the dog that plays Colin is credited as Aida the Dog. But this was an overlooked error. The dog's name is actually "Ada".
At the end of the last episode of series one during the scene where Tim and Daisy are dancing in the pub (discussing porn magazines), the band playing is actually fronted by Simon Pegg's real dad.
Edgar Wright was originally skeptical of casting Nick Frost in the role of Mike, as at the time, Frost was a waiter with no prior acting experience. In fact, the character of Mike was born out of Frost making Simon Pegg (his flatmate) laugh, and Wright later said that Frost was brilliant in the part.
Julia Deakin said she drew inspiration from a male friend (who's voice is similar to Deakin's character Marsha), and also from a woman she met once on a Greek island who was 'permanently pissed on red wine'.
The part of Twist was created specifically for Katy Carmichael. Carmichael said she was loosely based on a friend of hers and Jessica Hynes's from university.
Director Edgar Wright was notorious for doing many takes.
Channel 4 commissioned a second series before the first series was even transmitted.
As they were making a documentary about the series, Jessica Hynes', Simon Pegg and Edgar Wright were looking around the 'Spaced house', and one the people who lived there came and told them that there were Spaced fans outside taking pictures of the house. As a joke, Simon and Jessica went outside and said "are you taking pictures of our house?" The fans just stood there for a few seconds, stunned. In good nature they chatted and then posed for photos.
At the end of a documentary about the series made in 2004, there is a moment where the characters Tim and Daisy come out of the house and talk for a moment; if this is canonical to the original storyline, then they got together and had a baby girl (who Daisy refused to call "Luke").