What appears to be a hazing incident leads the SRU to discover a high school's dark history. Things become more complicated when their victim threatens to jump off the school's roof while another boy takes their basketball coach hostage.
A man escapes custody and takes hostage the coroner whose autopsy results stated his infant was shaken to death. Ed Lane leads the negotiation as the man demands the results be looked at by someone else in an effort to prove his innocence.
An unhappy customer with hostages at a credit union turns out to have a stolen identity. But the SRU soon realizes that the situation is more desperate and that there is another man involved who will stop at nothing to save his dying son.
When a 911 operator gets a call from a young person who is constantly telephoning in false alarms, the operator tries to hang up but she hears a shot so the team is sent to check it out. When they arrive they find a woman shot, and the girl is not there. They also find several ids. When the woman wakes up she reveals that her daughter witnessed a crime a few years ago. So that the authorities can catch the criminals, they went into hiding. She believes her husband and daughter are on the run. When they catch the shooter they learn he's not alone so the girl is still ...
Shaken by a gruesome spree shooting incident, Team One returns to the station only to come under review by Special Investigations Unit agent Jill Hastings. Each team member is sequestered and questioned separately about the incident in accordance with SIU procedure.
When Spike's mentor disappears with one of the two prisoners he was transporting after crashing into a bus, questions arise as to whether the mentor is the hostage or the hostage taker as the SRU discovers he was under investigation.
A man suffering from paranoid schizophrenia shoots a man and takes several others hostage in a restaurant where he is convinced the owner leads a terrorist cell. As the SRU tries to resolve the situation, they learn that there may be another person plotting a worse attack.
While the team is being re certified, they have to face a psychiatrist who is known for getting cops relieved of duty, and makes every member of team face up to certain things. And the commander claims he wasn't the one who brought him in. And this is all happening just as Ed's wife is going into labor.