TV highlights: The new comedy series 'Significant Mother' premieres on The CW.

(All times Eastern.)Magicians Matt Holtzclaw, Wes Barker, David Regal and Bill Cook are featured on "Penn and Teller: Fool Us" (CW at 8 p.m.). Master bakers make their best Lego-inspired creations on "Cake Wars" (Food Network at 8).