One character doesn't make a show, however.
Every once and a while there's a rare example in which this does work out, such as Patrick McGoohan as Number Six on The Prisoner
But from what I've seen of Walter (which is to say, a few youtube clips), he's not enough to hang the show on. An amusing supporting character can't keep a ship of leading characters who aren't the least bit interesting afloat.
I wish Lance Reddick was on a better show, but he's probably earning more money on Fringe
than he did on The Wire
, and it's a good stepping stone to a role in the next Abrams Trek movie, too.