The four dimensions are the management key factor dimension, the management field dimension, the management space dimension and the management time dimension.

四维为管理要素维、管理领域维、管理空间维、管理时间维。

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Played by Matt Smith, he journeys through "Time And Relative Dimension In Space" in his aptly-named ship, the TARDIS -- which looks like a blue British police call box on the outside, and is as iconographic a vehicle as the U.S.S. Enterprise, Millennium Falcon or DeLorean.

CNN: Actress Jenna-Louise Coleman talks 'Doctor Who'