Castle

If you love a good murder mystery/comedy/romance show Castle is the show for you!  Lets just forget for a brief moment that Nathan Fillion is the main actor and will have you swooning from the start.  This show is about a murder mystery writer (Fillion) who wants to research his new book series by shadowing New York City's finest homicide detective Kate Becket (played by Stana Katic).  What first begins as playful annoyance in the first season eventually turns into sexual tension then a romance for every fan to envy.
The character Richard Castle (Fillion) has some of the funniest pun and one liners that will keep you laughing during what would normally be a dramatic show.  His quest for a story in every murder proves helpful in solving the case and finding the killer.  While Detective Beckett (Katic) is the down to earth logical detective who's main concern is evidence and doing things by the book, which isn't to say she can't be talked into bending the rules occasionally.

Other main roles in the show include Castle's mother (played by Susan Sullivan) and daughter (Molly C. Quinn) and Becket's assisting detective's Ryan (Seamus Dever) and Esposito (Jon Huertas) who have a brother like relationship that's fun to watch.

The best part is you can view the latest episodes on Hulu.com.  As of now none of the seasons are available on Netflix sadly.