If your website is the authoritative source for the video of a particular TV show -- make sure to submit "Video Sitemaps" or "mRSS feeds" to inform Google about video content on your website.
In addition, Google now support "additional fields in both video Sitemaps and mRSS feeds where you can specify metadata specific to television or episodic content. This includes the series' title, the season and episode numbers for the video in question, the premiere date, as well as other additional info. The metadata from your video feed helps us provide more detailed, relevant results to users wanting to view your show," stated Google.
Here's an example Video Sitemap entry that includes all the required and some optional TV metadata in the