What benefits does this service have over the API provided by TheTVDB, which is your stated data source? I haven't interacted with theirs extensively, but it appears to offer the same functionality.
It is mashed up with Guidebox to provide information on where an episode can be watched online. In addition, it has a better selection of TV artwork and episode thumbnails.
I envisioned this as "in addition to" TheTVDB to help round out their selection and provide additional API calls.
Hadn't put much thought into the Actor field. Is there a big need for this? Do people care much about finding (for example) all shows for a particular actor?
I find this interesting for movies, but not much for TV. Thoughts?
Separating functionality between the two doesn't really make sense to me -- consider it akin to an actor's filmography on IMDb, which lists pretty much everything that they've had a role in.