Where exactly does Search search?

[WoodyBABL]

Using 10.11.2.

Was trying to put together a collection of Christmas episodes, so I searched for Christmas... naturally. 

I noticed that an episode of Newhart was missing. The episode description contains "24 guests are snowed in on Christmas Eve." 

I thought maybe it needed to have a tag..So I added the tag Christmas to the episode metadata.

Did a search for Christmas and the episode still didn't show up. Tried the search through the Android TV client and the Android phone client. Any idea why the search is ignoring it?

[crobibero]

The title. That is it

[WoodyBABL]

Wow. That seems limiting.

Just now I went to the Shows library and filtered by the tag Christmas. I see that only picks up if the tag exists for the series not individual episodes.