CW has greenlit Aliens in America, a half-hour comedy pilot about a Muslim foreign-exchange student who moves in with a Wisconsin family. "It's hilarious," CW president Dawn Ostroff tells Jack Myers' MediaVillage.com, "and it carries a strong message about tolerance and understanding our differences."... Roger Bart (aka Desperate Housewives' George) is joining Tom Cavanagh in My Ex-Life, a CBS comedy about divorced couples.... Related's Jennifer Esposito has a "second position" gig, replacing Alicia Witt as the titular shrink in Fox's More, Patience.... Cloris Leachman is set to play mom to Eddie McClintock and Craig Bierko in an NBC comedy from Chris Sheridan (Family Guy).