“The Big Bang Theory” (8 p.m., CBS): As “The Big Bang Theory” launches

“The Big Bang Theory” (8 p.m., CBS): As “The Big Bang Theory” launches Season 7 with back-to-back episodes, Leonard (Johnny Galecki) returns from the North Sea to find out that Sheldon and Penny (Jim Parsons, Kaley Cuoco) have been spending some quality time together.

“The Crazy Ones” (9 p.m., CBS): Robin Williams and Sarah Michelle Gellar star in this (allegedly) comedic send-up of the ad game.

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