Wizards vs Aliens is an action, adventure series which sees the collision of two very different worlds.
The first series focuses on Tom Clarke, a 16-year-old Wizard, and his scientist best friend Benny Sherwood as they come across the forces of an alien race called the Nekross who have invaded Earth to consume anything or anyone connected to Magic.
In the third series, Tom and Benny part ways when Benny receives an opportunity to work with MIT in America. The Nekross return to Earth's galaxy, with Varg, now King Regent of the empire, intending to have vengeance on Tom for turning his sister Lexi into a human (which he did to save her life) and sending her to Earth. He is assisted by his wife Lady Lyzera, who is secretly a sorceress who wishes to take Earth's magic for herself and take over the universe.
Wizards vs Aliens was originally co-created by Russell T Davies and Phil Ford to fill in the 5:00 schedule slot previously held by Davies's TV series, The Sarah Jane Adventures after its main actress, Elisabeth Sladen died. Although there were ideas for a replacement show before Sladen died, it was only during a meal when Ford and Davies came up with a unique idea, Aliens vs Wizards.
With the original focus of the series being a combination of alien life and magic, it felt only right that the programme should be called Aliens vs Wizards but, as Davies revealed, legal matters led to the show being renamed Wizards vs Aliens.
The development process of Wizards vs Aliens lasted six months. Davies described the script of the first episode as the "fifteenth draft" due to the vast number of ideas for the series. Davies revealed that, at one point, Tom had a sister but the idea was scrapped after looking towards future episodes and thinking whether she would work. Davies saw the three spells rule as a "marvelous part of the plot" and something that kids "really get into".
In January 2015, it was announced that the series had been put on hiatus due to financial reasons, but could return to fight another day at some point in the future.
Following the format held by its sister program, The Sarah Jane Adventures, each story is made up of two parts, with part one airing on a Monday and part two airing on a Tuesday.