Lies, Lies, and More Lies.
(Plot synopsis and potential SPOILERS below)
The title of the episode is quite fitting (“Blood Money”), because at the root of it is the tainted cash that Walt and Jesse earned during their run, and how it has effected them emotionally. Walt has fully accepted his new persona at this point, and is trying to move on with his family life by working at the White’s car wash business like nothing ever happened. He’s no longer the same Walt that used to work at the car wash before he became Heisenberg, who is one of the country’s most deadly drug kingpins.