As the new season begins, Cat Black is conflicted about her full-term pregnancy, because the father, Nicky (Nick Kroll - Worst Week) is 6 years old and has advanced aging disease.

Cat goes into labor, and Lola turns out not to be dead. Blake returns after his spin-off is canceled, and a sexy new doctor arrives and stirs up the "flames" of desire.

Halloween at the hospital causes Owen to be horny for the ghost of Lola. Chief's visit to the maternity ward results in more than she bargained for.

Blake's estranged clown brother, Sir Tinkle Button (guest star Paul Scheer - Funny or Die Presents), pays a surprise visit to Childrens Hospital.

When an elderly black man (Ernie Hudson - Ghostbusters) and a white teenage boy are impaled by the same flagpole, the staff learn a lesson about racial tolerance.

The cast and crew reflect on the show's history, recent cancellation and questions about the dolphin's place in the ecosystem. Guest star KATE WALSH (Private Practice) appears.

A knife stuck in a boy's chest may not be what it seems. Guest stars include JOHN CHO (Harold & Kumar films), WILL SASSO (MADtv) and KURTWOOD SMITH (That '70s Show).

When the power goes out on the hottest day of the year, sexual tensions boil over amongst the staff. Nurse Dori (ZANDY HARTIG) finds a new and provocative way to fry an egg.

A hip, sexy rabbi (guest star and executive producer DAVID WAIN - Wainy Days) arrives and seduces Valerie, which angers Glenn. Sy faces a moral dilemma involving a coffee machine.

"Take Your Daughter to Work" day starts a series of conflicts involving a leering child molester, Chief's sexy daughter and an 11-year-old patient whose gender is to be determined.

The abortion debate is brought relief by a visit from a senator (guest star ED BEGLEY JR.). Owen faces a tough decision. And, in a moment of clarity, Sy faces his alcoholism.

IQBAL THEBA and JON HAMM guest star in the season finale. Plus, in a surprise ending, the shocking truth about one of the doctors is revealed, shattering everyone's perceptions.