Booker learns that his father ran out on him as a child because he was made part of the witness protection program after testifying against a mobster.
Tony comes to Booker for help when the heirs of its former owner steal his new house.
An escaped killer, whom he testified against at his murder trial, stalks Booker.
Booker ends up having to help a 6 year old girl find her father, a repo man who is suspected of working for an auto theft ring.
One of Booker's old high school friends comes to him for help when he manages to become engaged to two different women at the same time, both of whom have violent relatives.
An old girl friend of Booker's hires him to find her fiancée, who is wanted by the police and was Booker's rival for her affections during high school.
Booker becomes involved with a high class call girl ring when he befriends a prostitute who is suspected of murdering one of her clients.
Booker goes undercover as a ski instructor at a plush resort in order to keep an eye on a Teshima insured diamond.
Booker learns a startling secret from Chick's past when Chick comes to him convinced that a Cuban revolutionary will soon murder him.
Booker helps a young computer hacker who broke into Teshima's master computer when they both become sought after by crooked federal agents.
Booker gets some unwanted help from Suzanne who wants to share the reward being offered for finding the killer of a fashion designer.
Booker is stalked by a mysterious hitman while working on a missing persons case.
Booker is truly happy with his latest assignment; he gets to look after his boyhood hero- a professional hockey player who is hoping to make a comeback.
Booker joins a Japanese executive from the home office on an all night search for singer B.B. King's stolen guitar, which is insured by Teshima.
Booker sets out to bring down Raymond Crane, the unethical businessman who cost Booker his job on the police force. The crossover continues on 21 Jump Street S04E10 Wheels and Deals (II).
Booker goes after Suzanne, a wild young woman who jumped out on bail Teshima put up and is being pursued by mobsters who are taking steps to insure she doesn't return to testify.
Booker sets out to expose a woman whom he suspects has killed her first two husbands, in order to collect the insurance money, before she marries a Teshima executive.
Alicia turns to Booker for help when her ex-husband, a compulsive gambler who is always looking for the perfect system, disappears along with their daughter.
It's up to Booker and Katie to defeat gunmen who have entered Teshima Tower, sealed off the building and taken the company's top executives hostage.
Booker becomes romantically involved with a Teshima executive while trying to keep a 14 year old orphan away from an allegedly reformed crack dealer.
After Booker's old colleague, Judy Hoffs, from his days as a member of 21 Jump Street, he sets out to find the shooter. But also still misses the rush that he got from the job.
Dennis Booker, after leaving 21 Jump Street and the police force, is unemployed and has no luck finding a new job. His former boss, Captain Fuller, recommends for a job at corporation; the Teshima Group. Upon his arrival, he doesn't exactly get along with his boss, Chick Sterling, but because he caught Sterling in flagrante delecte, Sterling gives him a job. His secretary, Elaine, who was recently on a jury that found a man guilty of a crime, he claims he didn't commit. Elaine was the only one on the jury who was uncertain of his guilt but was pressured byu the other jury members to vote guilty. But after the trial, the man's mother approached her and gave some info that makes her believe that he could be innocent. Booker then hatches a scheme with Elaine publicly recanting her vote but despite it not being enough to acquit the man, Booker saw someone watching the proceedings and Booker followed. Eventually, Booker was able to discover that the man had been framed and he eventually cau
