Last night's episode was a major treat. I never miss Castle; it's still one of my favorite shows. This week they had a pseudo 70's theme. I'm not going to expand on that so as not to spoil it, but I'll say only that Esposito, Ryan and Lainie were not to be missed. Martha and Alexis got in on the fun, too, though to a lesser degree. Cool music in the disco bar, too.