S7, E21: On the eve of Rory's graduation, Emily and Richard host a party and perform a song in her honor. At the fete, Lorelai and Christopher (recurring guest star DAVID SUTCLIFFE) reunite for the first time since their separation, and both are relieved to find that they can still be friends. Logan surprises everyone by proposing marriage to Rory--but she is too shocked to give him an answer and begs Lorelai to help her decide what to do. On graduation day, Rory and Paris receive their diplomas, and Rory finally gives Logan her answer. Meanwhile, Lorelai is embarrassed about her recent karaoke serenade to Luke, and he is hurt when he overhears her saying it didn't mean anything.