: Lexie Grey persistently tries to bond with her half-sister, Meredith, who remains resistant and dismissive.
: The doctors treat victims of a "stove explosion" that is later revealed to be a meth lab. Alex Karev deals with the fallout when a father endangers his infant son, leading to a physical confrontation and the father briefly fleeing with the child. Watch www xrysois se Greys Anatomy S04E02
For a closer look at the emotional weight of this episode, particularly the arrival of Lexie and the tension between the sisters, watch this breakdown: : Lexie Grey persistently tries to bond with