Forget the title, just say your most favorite non-MLP TV episodes. If you don't watch any TV show other than MLP, just say your favorite episodes of shows you used to watch. If you only watch MLP, oh well, you know what will apply to the posts.
For me, it would be:
1: Robot (Doctor Who)
I welcomed Tom Baker to the series, and when I watched this episode I really enjoyed the episode.
2: The Day of the Doctor (Doctor Who)
It was my first Doctor Who episode I had watched, and I really love this episode, in fact I became a Whovian upon seeing it!
3: Gridlock (Doctor Who)
I thought I was going to be bored while watching this, but turned out to be wrong, and I enjoyed it.