Production Designer Alfred Sole on becoming clueless. EP 606 was really exciting for me. I love going back in time and designing period. We did a lot of research and ultimately it was as fun as the Da Vinci Code. There were so many clues that we had create to after awhile I became clueless."

Nathan Fillion and Susan Sullivan share a sweet moment behind the scenes on Castle Season 6 Episode 6, "Get a Clue"

We don't know his name but The Goonies was definitely the '80s! Still, we can't get enough of seeing Nathan Fillion and Jon Huertas in their '70s costumes.

If only this beautiful vehicle had been able to drive our happy couple off into the sunset. Sigh. Fingers crossed we'll get that some time soon in Season 7.

There wasn't much smiling going on for these sister during Castle Season 6 Episode 19 but it's nice to see Penny Johnson Jerald and Salli Richardson-Whitfield looking so happy behind the scenes.

A shot of the always beautiful Stana Katic from Castle season 6.

100 Episodes of Castle was definitely a reason to party. Hopefully we'll get to celebrate 100 more.

Apparently things can get a little rough behind the scenes when Andrew Marlowe doesn't get his way!

Check out this Castle Season 7 poster, "'Til Death Do Us Part"

Detective's Ryan, Esposito, and Beckett look like they've just come across something pretty shocking! We can't wait to find out what it is.

The search is on to find a missing Rick Castle on the season 7 premiere on September 29th.

If I were a bad guy, I'd really think twice about messing with Kate Beckett right now.