TV spinoffs: The best and worst since 1990

(BBC America)
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'Torchwood'

Spinoff of: "Doctor Who"

More adult than its predecessor, "Torchwood" has managed to keep "Doctor Who's" sense of fun intact while telling stories that are often darker and certainly sexier. Its new season will be a co-production of the BBC and Starz, which could allow it to push the envelope even further.

-- Rick Porter, Zap2it