Consider this an early Valentine's Day gift, Castle fans: The show's fifth season is getting bigger!You're how old!? Check out celebs who don't look their ageABC has ordered an extra episode of the procedural dramedy, TVGuide.com 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... Read More > Other Links From TVGuide.com Nathan FillionStana KaticCastle