The devastating San Francisco earthquake is re-enacted as Jack and Billy help citizens connect with loved ones via the radio waves, Devon has a close encounter, and Zymak and his family re-unite under tense circumstances.
A young woman is killed in a hit and run accident. Because her father is a prominent attorney, the police pull out all the stops. Zymack assigns the case to a Detective Slocum. At the same time the father, who is despondent and who knows Devon turns to her who asks Jack to talk about the incident on his show hoping that someone who knows something or even the one who did will come forward. Now the police learn what car struck the woman and it turns out to be the same car Devon owns. And when someone accidentally hits it leaving a mark that makes it appear to have been...
Jack's been indicted and is now facing charges of vehicular homicide. He sets to prove his innocence by trying to figure out how the thief who knows so much about the accident. And talks to someone who tells him how she could have done it. He speaks to someone who was there and the person recalls something which he thought was insignificant at the time. But Jack decides to use that info hoping it will lead him to the person who actually ran the girl down.
A young black man appears to have been beaten and when his parents ask him what happened he tells them that Zymack did it. Zymack denies doing it but can't prove he didn't. An outspoken minister stirs things up and Jack tries to find out the truth.
Jack brother, Frankie calls him saying he's in trouble. So Jack goes to meet him but when he arrives, he sees his brother, playing with their father whom he doesn't know. Jack introduces them to each other. And his brother doesn't exactly welcome him with open arms. After telling Jack and their father what happened, their father deduces that someone is using him as a fall guy. So they try to clear Frankie. They run into a girl who's also caught up it, who joins them.
A guy Jack knows is trying to find his brother who is in Colombia and was taken captive by drug dealers. He goes through all the normal channels to find him but can't. So in an act of desperation, he abducts a Colombian official and demands his brother's whereabouts.
Jack reflects on his past and value as a midnight radio host. Jack contemplates his future at the radio station while struggling with the ghost of his wife. Meanwhile his radio station boss considers leaving the station with her love interest to sail around the world. While she reconciles her conflicting loyalties she reveals to Jack she is pregnant.
Devon makes Jack take part in a bachelor auction. And the woman who buys him is a wealthy woman and he takes a liking to her. But later he learns that she's a person of interest in some murders. And Jack notices things that could prove her to be a killer.
A part of the city which has a lot of Asians moving in makes some of the residents unhappy. Jack goes on the air to talk about it. And one of the residents who says he is being forced to leave because someone, a Chinese bought the property where his business is and is raising the rent. Later a Chinese boy is attacked by some kids, who are irate of what's happening, and the boy is killed. The man Jack spoke to, knows them and Jack asks him to convince them to come forward.
Devon's leaving San Francisco with her new husband and baby, so she sells the station. And she gets an offer but the buyer states that the one thing he wants is Jack whom he considers to be the station's primary asset. And Jack gets an offer from someone who wants to syndicate him and he doesn't exactly turn him down.
At a prison, the convicts revolt and take some of the guards hostage. It seems that one of the convicts who is extremely outspoken about the harsh conditions in the prison, has taken ill and the prison officials are refusing to authorize treatment. They ask for Jack and they want him to broadcast from the prison so they can air their grievances.
Jack continues to broadcast from the prison and spends some time in various cells. The warden wanting things to end, tries to get the Governor to authorize sending men in to retake the prison. Zymack learns that a man Jack crossed paths with when he was a cop is in the prison and the man wants to see Jack.