The Canadian teaser for Thursday's episode is markedly different from ABC's Grey's Anatomy promo, which highlights some of the week's lighter scenes. Not here. In this promo, Lexie joins Arizona and Alex in peds.

It's not a joyful occasion, as you can see below. She likens the hospital's official decision regarding a patient as a virtual death sentence. Will she get them to change course, and will the patient ultimately survive?

Also in this week's installment:

• Adele's condition prompts Richard to consider altering their living situation.
• Cristina grows jealous over how she interprets Owen's interactions.
• An coffee shop explosion will result in a busy day in the ER.
• Callie will continue to help Meredith study for her boards.
• Mark will encourage Jackson to "relieve stress."

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.