DH & I are looking for a new series to start.

Preferably something that already has one or more season available to watch on Amazon, Netflix or On Demand.

Examples of shows we like/have already watched:
Alias, Arrow, Viking (DH), The Walking Dead, Blacklist, Lost, Parenthood (me), we did start a few episodes of Downton Abbey and Mad Men, and there's more that's escaping me.

Thanks!