Pinewood Studios:Season one was shot entirely on location. After the building used as the newspaper offices in Uxbridge was demolished, interiors for season two were shot at Pinewood Studios. The series was shot on 16mm film, giving it high production values, but a high cost, almost leading to cancellation at the end of season two.
Shepperton Studios:Seasons three and four were shot at Shepperton.
Twickenham Film Studios:Season five was shot at Twickenham.
Popular children's drama series, written by ex-teacher Steven Moffat, now lauded for his work on Doctor Who.