James Henriksen

The boys unleash pandemonium during a visit to the zoo; Francis and Piama befriend a German couple (guest stars Kenneth Mars, Meagan Fay) looking for a young man with a strong back to work on their dude ranch.

Everything goes out of control when Reese joins the Army, Hal is accused of insider trading, and Lois falls into a catatonic state.

Lois anticipates a civilized evening of adult conversation when she accepts a dinner invitation from Stevie's parents.

Turk (Donald Faison) makes plans to propose to Carla (Judy Reyes) only to watch all his plans fall apart when one thing after the next prevents him from actually popping the question. Meanwhile J.D. (Zach Braff) comforts a patient in need of a heart transplant by explaining his theory about the balance between life and death in the hospital. This theory is put to the ultimate test when a husband must choose between saving his unborn child and his wife's well-being. On another front Elliot (Sarah Chalke) prevents Dr. Kelso from expanding his office space when she launches a campaign demanding that Dr. Kelso (Ken Jenkins) build a separate female locker room. John C. McGinley and Neil Flynn also star.

Doyle gets a chance to atone for his past when Angel agrees to help a group of mixed-heritage demons being hunted by violent pure-blood demons known as The Scourge.