Nothing is exactly like The Walking Dead, since the Post-Apocalypse show has never been done this well in a TV-series.

Hell on Wheels has a similar vibe, and quality though.

American Horror Story not the same, but similar quality.

Good and Walking Dead don't deserve to be in the same sentence.

Doh!

?

Downton Abbey

Mr Selfrege

Breaking Bad

House Of Cards

I haven't watched it because my age, but possibly Game of Thrones. I heard its good.