Volume 1 of The X-Files Mythology collection is a DVD release containing selected episodes from the first to the third seasons of the American science fiction television series The X-Files. The episodes collected in the release form the beginning of the series' mythology, and are centred on alien abduction at the hands of "colonists". Several of the elements introduced in the collected episodes arose through necessity during production, as working around the pregnancy of lead actress Gillian Anderson led to both the creation of unifying plot thread and the introduction of several recurring characters.