Here’s the address for the studio. You can change the “c/o” to Andrew W. Marlowe, Rob Bowman, Terri Edda or any of the other writers and crew members listed in the credits on IMDB. It’s a good idea to write to any and all of them, but mix it up! You only need to add the country to the bottom if you’re outside the USA.

Raleigh Studios
CASTLE
c/o Andrew W. Marlowe
Clinton Building
5300 Melrose Ave.
Los Angeles, CA
90038
United States of America

You can also tweet the Castle writers and crew:
@AndrewWMarlowe – Andrew W. Marlowe: Creator, Executive Producer, and Writer
@TerriEdda – Terri Edda Miller: Co-producer and Writer
@lzakshorn – Laurie Zaks Horn: Executive Producer
@AlexiHawley – Alexi Hawley: Co-producer and Writer
@KitMoxie – Christine Boylan: Writer
@LilAngelK8 – Kate Sargeant: Writer
@Castle_ABC – Official Twitter site for the show

Seamus Dever & Jon Huertas love to know how much we enjoy their scenes, but the writers & producers are the people with the power to actually give them more screen time!

It also couldn’t hurt to mention @CastleSPICE in your tweets to them so that they know there’s a lot of us out there who want more Ryan/Esposito. Be sure to follow us as well for updates on the campaign. Tweet us what you’ve done for the movement lately and we’ll RT you so others can feel inspired to do the same!

Although this is not as absolute as contacting the writers directly, you can also write to ABC about how much you love Ryan and Esposito and call their hotline at 1-818-460-7477. Then press 1, 2, 2, and 226 for the Castle hotline.

ABC address:
Castle TV
ABC Inc
500 S. Buena Vista Street
Burbank, CA 91521-4551
USA