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The duration of Horizon - BBC TV series - is 3540.0 seconds.
Horizon - BBC TV series - was created on 1964-05-02.
Q.E.D. - BBC TV series - ended in 1999.
Q.E.D. - BBC TV series - was created in 1982.
The duration of Q.E.D. - BBC TV series - is 1800.0 seconds.