Michelle Ongkingco

Cristina, Izzie and Meredith aggressively pursue the case of Shane, a male patient who seems to have a hysterical pregnancy, which fascinates them and the entire medical staff; and a sheltered young patient inspires Alex to better express his feelings for Izzie.

Ryan travels to Mexico-with a stubborn Seth in tow-to put an end to his turmoil in the only way he knows how, but he comes up empty in quest for revenge. Meanwhile, Seth meets some new friends in Mexico, who help him find what he is looking for.

Taylor is sure the remedy for Ryan's sleeplessness is...Taylor! Plus: Summer is set up to take the fall for lawbreaking activism at Brown. And Kailtlin and Julie eye the same himbo.

While introducing Lorelai to his sister's new baby, Luke shares a sweet moment with her. But when Christopher (recurring guest star DAVID SUTCLIFFE) witnesses the scene, he becomes concerned that Lorelai isn't fully committed to their marriage. Later, the two fight over whether or not they should exchange vows at the elaborate wedding party that Emily is hosting for them. And Luke and Christopher have an ugly confrontation on the streets of Stars Hollow. Meanwhile, upon discovering that Rory and Marty (recurring guest star WAYNE WILCOX) have been pretending that they just met, rather than admitting their previous friendship to Rory's friend Lucy (recurring guest star KRYSTEN RITTER), Logan reveals the truth to her. Also, Emily gives Lorelai a warning about her marriage. And Luke contacts a lawyer over his custody troubles with Anna (recurring guest star SHERILYN FENN).

Following a career-week presentation at Grandview High, Melinda sees the spirit of a cheerleader attack her former squad-mates.