In the first 8 seasons, the show would constantly have unauthorized individuals walking freely through the ER, ranging from family members of patients to criminals. This was done for dramatic purposes but is completely fictionalized relative to how every major ER department in the country handles security (and triage for patients). Early in Season 9, the show brought in real-life security and patient control measures that are much more realistic.
Abby calls Carter Norma Rae; the character Norma Rae is played by Sally Field. Sally Field plays the role of Abby's mother