Search for a certain actor/actress? Then show what they star in?
I'm a big fan of how Letterboxd has their Actors pages and was curious how you were going to handle this. I like how they list the cast for each movie, how you can link to each actors page which has a nice layout.
For your TV show casts - most sites limit the cast list to the main cast, but i'd love the idea of having recurring guest stars listed as well. I mean, there's no need to list every single actor that's ever appeared on a show, that'd be ridiculous, but many shows have significant actors who appear sporadically throughout it's run. Smallville, for example:
I love the visual style of your site, and I hope you continue that with each new addition.