From my limited knowledge of these things, bugs and cameras transmit a signal that can be detected. That's why the bug detector beeped a dummy sound.
A hard wired bomb would be no more detectable than a hard wired light switch.

If your wife is cool knowing that you killed a drug kingpin and a couple henchmen in a NURSING HOME, it's time to suggest a Vegas trip that includes a three-way with a hottie escort…

Mike comes back as the 'glue' that holds (what's left) of the Fring gang together. And he collects Gus' videos and anything else that may interest law enforcement.

Walk poisoning Brock is a bit convoluted, but it's no "The Killing" level ass pull. To a meth head like Jesse, it would sell. Although, give Jesse time - he may think otherwise…

Best episode of the season, for sure. 
At the start, I thought the title, "Salud", had something to do with Sal and the Ted inheritance scheme he cooked up. We didn't see Sal at all last episode (I think), so I thought he may be the focus.