TV highlights: Chris Rock hosts 'SNL' with musical guest Prince

Missy and the Doctor finally meet before major, possibly life-altering plans are drawn in the Nethersphere on "Doctor Who" (BBC America at 9 p.m.). Chris Rock hosts "Saturday Night Live" (NBC at 11:30), with musical guest the purpleness himself, Prince. (Psst . . . the flashback "SNL" at 10 is the one with Sarah Palin, in case you wanted to relive that one.)