When Lois thinks she might be pregnant again, she and Hal argue and remember how their lives changed with the births of each of their sons.

When Malcolm finally finds a girlfriend, he loses focus on his schoolwork, and Dewey makes a new friend - a real one.

Lois tries to get the boys to behave until Christmas by holding their presents hostage, while Francis spends Christmas with his mean-spirited grandmother.

JD has competition for the title of top intern at the hospital, Turk loses his cool in the operating room, and Carla sees through Dr Cox's rough exterior.

After finding out that Turk is still talking to an ex-girlfriend, Carla moves out to think things through.

It is the eve of the wedding and the pressure is getting to Turk, especially as he has to write his own vows. Meanwhile, JD just cannot decide on his true feelings that he has for Elliot.

Dr Cox rails against drug companies while falling for the wiles of a beautiful pharmaceutical sales rep and JD, Elliot and Carla consider the effects of taking risks.

JD must learn to handle a verbally abusive patient while Dr Cox's love-life spirals out of control. Meanwhile, Elliott and Turk discover Dr Kelso's mysterious musical past.

JD becomes arrogant after correctly diagnosing a patient's illness before Dr Cox does, and Elliot's patient sues her because he doesn't have cancer.