With "Madrigal", Mike enters into the spotlight and we, for the first time, get to see what his daily routine consists of besides the meetings with Walt and Jesse. But though he may have got the most screen time in this episode, it's still Walt who remains in the centre of discussion afterwards, as his evolution to becoming Heisenberg is now completed.
Whether it's him terrifying his wife in bed, impassively upholding the lie of what happened to the ricin cigarette and Brock straight into Jesse's face, or accepting Mike's news at the end calm as a motherfucker (that did it for me) Walt is more startling than ever in "Madrigal", the first episode of the series to indicate his new persona that evidently. Despite all the awkwardness these aforementioned three scenes hold (watch the extended version of Walt and Skyler's scene in the bed for this sentiment to increase even more), the acting is sublime and, together with Vince Gilligan's script, perfectly illustrates the characters' current positions. In one story arc though, Breaking Bad's creator and mastermind prefers to stay ambiguous: newly introduced character Lydia Rodarte-Quayle, very believably portrayed by Laura Fraser. She was one of the biggest names in Gus Fring's hidden and now unveiled drug empire, yet manages to stay out of prison, at which point in the story we first meet her. The distraught, uptight broad she seems to be at first glance when conversing with Mike in what is possibly the series' best diner scene does also have some different facets, as she reveals in the succeeding episodes.
"Madrigal" could have been an outstanding conversation-only episode, as this series does it so very often, but there are also some rougher parts here and there, one reacquainting us with the wonderful James Ning as Chow and one at Lydia's home, which ensures a multifariously entertaining episode that also functions as a great introduction for the marvellous plot of season 5A.