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STORM FRONT - RICHARD CASTLE'S NEW DERRICK STORM THRILLER - ON SALE TUESDAY, MAY 21

"Castle" Season Finale Airs Monday, May 13

With 1.5 million copies in print of Richard Castle's No. 1 New York Times bestselling Nikki Heat series and over 200,000 units sold of Castle's Derrick Storm eBook trilogy, fans are still clamoring for more. On Tuesday, May 21, the next installment in the Storm series hits bookstores nationwide. The rip-roaring, full-length thriller, Storm Front, features CIA agent Derrick Storm taking on his old nemesis who is trying to destroy the global economy and unleash untold worldwide chaos.

"Castle's" Season Finale will air on MONDAY, MAY 13 (10:01-11:00 p.m., ET) on ABC. In the episode, "Watershed," an interview with a high-profile federal law enforcement agency forces Beckett to reconsider what she wants out of her job -- and out of her relationship with Castle. Meanwhile, the body of a young woman is found floating inside the water tank of a skid row flop house, but as the team investigate, they discover that her final resting place is just one of many strange things about her death.

"Castle" stars Nathan Fillion as Richard Castle, Stana Katic as NYPD Detective Kate Beckett, Susan Sullivan as Martha Rodgers, Molly Quinn as Alexis Castle, Penny Johnson Jerald as NYPD Captain Victoria Gates, Tamala Jones as Medical Examiner Lanie Parish, Jon Huertas as NYPD Detective Javier Esposito, and Seamus Dever as NYPD Detective Kevin Ryan.

"Watershed" was written by Andrew Marlowe and directed by John Terlesky.

For more information on "Castle," visit ABC.com