Nick News with Linda Ellerbee: The Story of September 11, 2001 (9pm, Nickelodeon) - Kids too young to remember the attacks of September 11 discuss their questions about the event with journalist Linda Ellerbee.
Project Runway (9pm, Lifetime) - The seamsters union join forces with art students to create artwork that will inspire clothing designs. Designer Kenneth Cole is the guest judge.
Sweet Home Alabama (9pm, CMT) - Devin chooses between the last two suitors in the first season finale.
Ultimate Merger (9pm, TV One) - A military obstacle course must be tackled to win a date with Toccara.
Suits (10pm, USA) - Harvey's former mentor (Gary Cole) turns to his protege when his office comes under investigation. Meanwhile, Mike and Louis try to settle a mogul's estate in the midst of family clashes, and Jenny worries that Mike is hiding something.
Louie (10:30pm, FX) - Louie's distraught sister drops off her daughter at Grand Central Station and then gets back on the train that brought them to New York. Comedians Godfrey, Todd Barry, and Nick DiPaolo appear as themselves.
The Green Room with Paul Provenza (11pm, Showtime) - Season 2 ends with comedians Eddie Izzard, Jimmy Carr, Judah Friedlander, Chris Hardwick, and Tim Minchin.