Suits (9pm, USA) - In the Season 3 finale, Harvey and Mike clash with a tenacious U.S. attorney. Elsewhere, Scottie and Harvey struggle to reach a compromise, and Mike and Rachel have different ideas about the future.
Also on tonight . . .
Big Bang Theory (8pm, CBS) - Raj and Emily double-date with the Wolowitzes, and Howard becomes flushed with embarrassment after Emily reveals a secret she knows about him. Meanwhile, Sheldon is at loose ends when he believes he's wasted his career trying to prove string theory.
Project Runway: Under the Gunn (9pm, Lifetime) - Season 1 ends with the designers being given three days to create their collections and present them in a runway show. Heidi Klum and Neil Patrick Harris guest judge.
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Grey's Anatomy (9pm, ABC) - Cristina is nominated for a prestigious award and remains calm amid all of the excitement, while Bailey tries to help a boy who doesn't have an immune system.
Parenthood (10pm, NBC) - Crosby asks Joel for help dealing with a housing problem and Kristina fights for the charter school while dealing with upsetting news. Also, Hank helps Amber deal with a scary issue involving Ryan.