In this Tribute to The Shield episode, the boys welcome Ronnie Gardocki himself, David Rees Snell, to the show. Too bad he has a nothing role in a nothing episode ("Remembrance of Things Past"). Like, we're talking Season 6 nothing. There's so little to talk about the boys spend a digression on the NBC hit La Brea, that's how bad it gets. Otherwise it's a geezer on geezer showcase as Joe Mantegna fights an unsub with dementia. It really should not be this difficult.