Tatanka Means

An FBI informant refuses Witsec protection and gets himself in a heap of trouble; Stan works with a witness suffering from pugilistic dementia.

Topher takes over as chief of the night shift in the Season 2 opener. Also: TC is temporarily suspended; Jordan is scrutinized for her mishandling of the man who shot a recovered Topher; a father is trapped under an elevator; Ragosa returns to the ER.

As Jordan (Jill Flint) faces suspension for ignoring a religious patient’s “do not treat” directive, a military training accident makes Drew (Brendan Fehr) directly responsible for a fellow soldier’s life.

A shooting sends two of Drew's friends to the ER. Meanwhile, a woman's psychosis worsens, becoming a danger to herself and her father; Paul breaks hospital rules to treat a 9-year-old boy with severe cystic fibrosis; financial problems plague Ragosa.

A downtown gas explosion sends dozens of casualties to the hospital. TC, Drew and Gwen scramble to the chaotic scene as Topher leads the team at the hospital. Meanwhile, Paul delves into his first night in surgery rotation while dealing with the unexpected arrival of his neurosurgeon father.

Cheryl, Heather and Cal get jobs as they try to embrace a crime-free lifestyle; Cal finds out his new job as a pool boy has unexpected requirements.