6x09 - The Prodigal Daughter Returns
A surprise phone call from Christopher (David Sutcliffe, who does not appear in the episode) brings up issues of trust between Lorelai (Lauren Graham) and Luke (Scott Patterson). Later, when a person from Luke's past shows up in Stars Hollow, he has no idea how to tell Lorelai about it. After months of estrangement, Lorelai and Rory (Alexis Bledel) make their first move toward reconciliation and Rory takes major steps to change the direction of her life.