An invisible guest pays a visit to the Ministry's records office. Steed and Mrs Peel follow a trail to an inventor who has made an extraordinary breakthrough. Show more
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An invisible guest pays a visit to the Ministry's records office. Steed and Mrs Peel follow a trail to an inventor who has made an extraordinary breakthrough. Show more
BBC Four reflects arts, music and culture with an ambitious range of intellectually and culturally enriching programmes, taking an expert and in-depth approach to its subjects.
