7.5 (number)

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A piece of paper, featuring the number "7.5". (TV: The Doctor Dances)

7.5 was a number. (TV: The Doctor Dances)

On 20 January 1941, (TV: Everything Changes) some speakers had a piece of paper attached to them with the number "7.5" written on its right side. (TV: The Doctor Dances)

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