TV This Week: Doctor Who, Ben 10 And Smallville

There's actually a lot of great science fiction TV coming up — unfortunately, it's almost all at the end of the week. Doctor Who returns to the Sci Fi Channel, Ben 10 starts a new series with a more grown-up hero, and Smallville comes back from hiatus with an episode that will change everything. (Or at least some… » 4/14/08 9:00am 4/14/08 9:00am