Cat breaks up with Glenn, and Lola fakes a brain tumor to dump Owen. Later, they "console" each other. Blake is a sad clown, and Owens ex-partner tries to lure him back to be a cop. American forces raid the hills of Pakistan in search of bin Laden.

Things get tense after Cat sneezed on Lola. Meanwhile, Briggs tries to get Glen back on the police force.

The Chief calls a staff meeting to discuss Lola's nonexistent brain tumor.

The Chief tries to help a boy who has aged rapidly. Meanwhile, Blake tries to help people via the healing power of laughter.

Another doctor tries to use Blake's method: the healing power of laughter.

In this very special episode, things are told from the perspective of a visiting doctor from Puerto Rico.

Glen gets upset about Cat's new boyfriend. Meanwhile, a new doctor may be able to cure The Chief.

Blake challenges Nate to a competition where the two doctors must perform surgery using only the healing power of laughter.

Blake tells Lola he knows her brain tumor is fake. Meanwhile, Glen tries to get revenge on Cat's new boyfriend.

In the season finale Max performs surgery on The Chief and Blake tries to cure Lola's nonexistent tumor.