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.

Sy runs himself ragged trying to impress an influential blogger before the big hospital fundraiser gala.

When Cat breaks up with Owen, Lola decides to be supportive and break up with her own boyfriend, Glenn, by telling him that she has brain cancer.

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

When Sy's new girlfriend makes significant changes around the hospital, the doctors react with hostility.

Five years after leaving the army base, Owen must re-integrate into a 'normal' life at the hospital.

When Sy finally gets tenure, he decides to use its powers for the greatest good: building the world's first consumer jetpack. Elsewhere, Chief is stranded on a dance pedestal, and Owen learns just how hard it is to be the hospital DJ.

A race horse is wanted by fearsome mob boss Mamma Fiorucci, so Chief hides the animal in the hospital, all while Lola's college barbershop quartet tempts her into rejoining and Glenn glues Blake's hands into his latex gloves. VALERIE HARPER and WILL SASSO guest star. Recurring guest star BRIAN HUSKEY also appears.

The doctors go back in time.

In a "Behind the Scenes" episode, actor Just Falcon (who plays Dr. Glenn Richie) invites the rest of the Childrens Hospital cast to his special photography exhibition, where all of their shocking secrets are revealed.

Lola may have a superpower, and Blake and Dori seek parenting advice.

When Blake realizes that the source of his life's pain is the other doctors, he decides to take revenge.

Owen discovers that the fluid in Chief's hump tastes exactly like Coca Cola. Despite Chief's protests, Owen attempts to monetize her "hump cola," while Blake suspects Glenn has an addiction problem and takes him to Nils Vildervaan, professional rehabilitationalimist. MICHAEL SHOWALTER guest stars.

Set four years ago, Nurse Beth's origins are uncovered as we explore the world of the Nurses' Quarters in the Childrens Hospital basement. Beth has to navigate the complex social hierarchy of the nurses and avoid losing their friendship when she suddenly gets promoted to doctor.

Lola and Brian try to locate Cat's father; the doctors wait for a prisoner's execution and plan to use his heart in a transplant procedure.

Single mothers receive discounts.

Shocking DNA test results cause confusion and chaos among the staff.

After a newspaper calls him a "rock star surgeon," Glenn worries that he will die on his upcoming 27th birthday.