The cast of "Third Watch" interviews real-life New York City firefighters, police and paramedics who were the rescue and safety workers after the terrorist attacks on New York City on September 11, 2001.
The evening of September 10, 2001... Bosco tries to avoid the results of a big match so he can watch it on tape later; Faith is waiting for her biopsy results; Sully and Ty go out on the eve of Sully's wedding to Tatiana; Jimmy is having trouble sleeping... and then morning comes around and it is September 11th, in New York City.
It's September 21, 2001 and the squads continue to battle through their emotions and their misgivings about their hero status, while working double shifts and spending every free moment at "the pile" searching for the missing; Kim returns to work and teams up with Doc, which allows an emotionally frayed Alex to return to paramedic duty; an exhausted Sully attempts to co-exist with his prospective in-laws while he waits for an opportunity to marry Tatiana.
Doc's colleagues nominate him as their choice for the "Paramedic of the Year" award but he is questioning his life choices. Faith is worried about her health while Kim worries about loosing Joey's custody to Jimmy.
No one can find Bosco after a sexual assault suspect is found dead. While Bosco spends time with family Yokas, Ty and Sully try to clear him as a murder suspect. Kim takes desperate measures to be with Joey.
Kim and Jimmy are having a custody battle over Joey. Boscoe and Faith are on a call of a possible terrorist threat, that ends up being an explosive event. Alex risk her self to save a little girl and is punished by doc for it.
Doc is up for paramedic of the year and is being followed by a film crew. Doc may have made a medical mistake when treating a patient. Faith recovering from cancer treatment and on the job fails to back up Boscoe while chasing a suspect.
Bosco tries to protect an old ESU sharp shooter from spiraling out of control. Faith contemplates taking the sergeant's exam. Davis and Taylor have a steamy affair. Doc feels the guilt over a mistake that made a boy a paraplegic.
It is the anniversary of Bobby's death. Kim finds a girl beaten on the street, whose friends don't want her to help. The investigation into the shooting gets underway, and Ross's shooter is identified. A baby is left at the fire house.
Fred reluctantly goes to the doctor for a physical. The power goes out while he and Faith are leaving the doctor's office, and they're left stuck in an elevator. Everyone else is dealing with the pressures of the city with no electricity.