What's On Tonight: Cougar Town, The Catalina, 20/20

Cougar Town, 8 p.m., ABC

It’s finale time for this sitcom – but it’s not the end! The show will move to tbs next year, after ABC decided not to pick it up again. “When Grayson complains that his life is like “Groundhog Day,'' Jules asks for that to be the theme of her bachelorette party; Grayson convinces Jules to elope, but their friends tag along.”

The Catalina, 8 p.m., CW

“A spring break pool party does not go as planned; sparks fly between bartenders Kris and Nancy, who used to date; Morgan, the restaurant general manager, competes in a beach volleyball tournament.” It’s like 90210, except with texting.

20/20, 10 p.m., ABC

The Jubilee Queen with Katie Couric. “Princes William, Harry and Andrew, Princesses Beatrice and Eugenie, and members of the queen's staff talk about Her Majesty, Queen Elizabeth II.” Because she has been on the throne for 1,000 years, I think.