Meanwhile , Walt buys the car wash where he used to work and uses it to launder his drug money .
Walt figures out what Gus is up to and gives Jesse homemade ricin with which to poison Gus , but Jesse never goes through with it .
Walt buys the car wash where Walt used to work and uses it to launder Walt 's drug money .
Walt figures out what Gus is up to and gives Jesse homemade ricin with which to poison Gus , but Jesse never goes through with it .