if I had any complaint, it's that it wasn't a musical as billed. Two minutes of music over the course of a 40+ minute episode does not a musical make.
We're not talking an episode of Glee
here. Anna Torv belting out a single chorus, and the other songs getting barely that, does not a musical make. Where were the chorus numbers, the dancing, the choreography? It was more a 30s Chandler/Hamett pastiche. And two of the songs (Jasika's and Lance's brief solos) didn't really correlate to the plot.
And what a waste of Cerveris, who played Sweeney Todd on stage in the musical (check out here, starting at the 2:35 mark
), to not have him singing or dance. Would having the Observer belt out a show number really been any less bizarre than the other stuff going on? And they confined Reddick to performing a few lines of a song, a waste given his on-stage work.
That said, I'd say that a (literally) heartbroken Walter left alone in his lab and poignantly stuttering out "The Candy Man" after he's abandoned, is one of the more effecting images of the series. Noble, as always, deserves an Emmy for his work on the show.