A boy stuck in quicksand is brought to the ER.

Briggs (Nick Offerman) goes undercover in the children's psych ward; Blake's ex (Sarah Silverman) resurfaces; and Chief and Glenn share a moment.

Blake is evicted from his apartment for being a clown; Dr. Brian returns to the hospital after a stint working for the drama "Black Hospital"; and Cat is overexposed.

The doctors feel crowded from sharing an apartment and decide someone should move out. Elsewhere, Sy deals with his own domestic issues.

A pediatric plastic surgeon joins the staffers; Max Von Sydow has a mix-up in the maternity ward; and Glen and Owen try to hunt down a snack.

Glenn returns from Vietnam; Lola has new career aspirations.

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.

The staff receive counseling after the death of Brock Stryker (Rob Riggle).

The doctors go back in time.

Owen's secret wife (Alicia Silverstone) and baby visit the hospital for treatment; Val plays a high-stakes game of chess.

The staff work the night shift under the guidance of Velam Geza.

A day in the life of Chet (Brian Huskey), the creepy paramedic.

Updates on the cast are featured on "Newsreaders" in the Season 3 finale.