S6, E22: On the evening of Logan's graduation from Yale, Rory throws him a wild party, but the knowledge that he is being forced to leave for London the next day makes their time together bittersweet. Meanwhile, at a Friday night dinner, Emily and Richard attempt to introduce Christopher (recurring guest star DAVID SUTCLIFFE) to an attractive young woman. And realizing that she was wrong to let Luke postpone their wedding for so long, Lorelai delivers an ultimatum. Also, Stars Hollow is suddenly overrun with musicians when news gets out that the town's regular street performer, the Town Troubadour (recurring guest star GRANT LEE PHILLIPS), has been "discovered." SONIC YOUTH, SAM PHILLIPS, MARY LYNN RAJSKUB, YO LA TENGO, SPARKS, JOE PERNICE and DAVE GRUBER ALLEN perform.