Nathan Fillion and Stana Katic Nathan Fillion and Stana Katic

Consider this an early Valentine's Day gift, Castle fans: The show's fifth season is getting bigger!

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ABC has ordered an extra episode of the procedural dramedy, has learned. The addition will bring the Season 5 total to 24 episodes.The extra hour will air in April, replacing a previously scheduled repeat episode. Castle, which stars Nathan Fillion and Stana Katic as crime-solving partners-turned-lovers, is averaging 9.9 million viewers a week and scoring a 1.98 among the adults-18-to-49 demographic.

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Speaking of Valentine's Day, the show will air Castle and Beckett's first crack at the holiday as a couple on Monday at 10/9c.