Michael Hyland

Bailey continues to put her wedding day on hold as she tries to save Adele's life; Owen and Cristina are unsure about their pending divorce; Callie and Arizona try to reignite their spark.

A young boy disappears in San Diego on Halloween, just as another boy who vanished one year earlier suddenly reappears.

When the team attends the White House Correspondents' Dinner in Washington, Mac makes an unexpected acquaintance and Will gets a surprise.

A dedicated paramedic disappears from a hospital moments after successfully treating a young thug who was wounded in a shoot-out during which he killed a rival gang member.

April's friends worry she is heading down a dangerous path when she uses her inheritance money to take a walk on the wild side. Brenna's short film is screened. Sara attempts to help others.

The constant playing of Will's song "Runaway Sleigh" causes him agony at Christmastime and forces him to take Marcus on a search for the original, handwritten lyrics to prove he is the song's sole writer.