It's Jimmy's birthday but the Finnerty's are at the hospital. Grampa reports Sean to a police officer who happens to be present - for attacking him. What happened at Jimmy's birthday party?
Walt gives Jimmy a Beebee gun for his birthday, and Sean and Claudia give him a chance with it, but later takes it back after Jimmy accidentally shoots his father with it. Walt criticises Sean for taking it away, and Sean shoots his own father.