Rick becomes obsessed about the war in Vietnam when a buddy who saved his life there is murdered. His determination to find the killer pushes him over the edge and into a VA hospital.

An amusement park owned by a retired Marine colonel is being repeatedly vandalized so the manager hires the Simons to work undercover but the more they learn about the vandal, the more they question who the real villian is.

The Simons' world turns upside down when the brothers discover the car that their father had died in was driving down the street. They stopped the driver to discover it was indeed their father's car, but he knew nothing - it had been bought at an auction the month before. Cecilia wouldn't believe the boys at first, but they finally convinced her it was the same car. While she and Rick couldn't believe he was still alive, AJ clung to the hope that he was, to the point of striking his brother. Both were horrified by how close they'd come to really hurting each other and resumed their search for the truth. After a long, frustrating search, they finally discover that Jack Simon hadn't died in a fiery car crash on a rainy night. He'd actually died months later of radiation poisoning, contracted when he was stopping some terrorists of stealing the radioactive materials. Jack's old boss and good friend shows them the cabin where he had really died and gave them the key. Inside the one-roo

There is a clue to the murderer of a cartoonist in one of his comic books.

Rick and AJ receive a letter in the mail and when it arrives at the office it's 23 years after it was sent, but contains a clue to the murder of the letter writer, who died the day after he mailed it.

Immediately after the Simons serve a man with divorce papers, he commits suicide-or does he.?

Rick and AJ are in Hawaii tailing a con artist who Higgins has just entrusted with $350.000 proceeds from his charity event-the three follow her to South America where they reel her in with a con of their own, using a huge emerald and AJ as bait. The crossover starts on Magnum, P.I. S03E03 Ki'i's Don't Lie (I)

Rick and AJ are hired to transport a valuable classic car to San Francisco but events along the way make them wonder if there isn't more here than meets the eye.

Rick and AJ have more than they can handle when they accept a job transporting a huge man who was placed in a mental institution by his brother, only to find out he is as gentle as a lamb, and the trouble they run into against his brother makes them enlist the help of their very huge friend.

A banks computer system is being accessed by a young computer whiz, who helps himself to a little spending money. One of the bank's officials wants to know how the boy does it, and hires the Simons to find out.

One of the old-time TV cowboys (a Saturday morning hero of young Rick and AJ) is accused of killing his show's producer when a young actor is hired to revive his old role.

Complications from their current case put Rick and AJ before the state licensing board to answer charges from an incident in Florida several years earlier, when AJ was engaged to Janet and working for Myron at Peerless Detectives. The incident is revealed in flashbacks taken from 1980 made for TV-""Pirate's Key"", which was the basis of the series.

After she finds new evidence, AJ's former girlfriend shows back up in his life to have him and Rick look into her brother's death, which could possibly have been a murder, trouble is it was eighteen years ago and it uncovers more than that.

A dolphin is abducted, and Rick and AJ have to find him and bring him back before his mate starves herself to death.

AJ is robbed while delivering $450,000 in diamonds, and he and Rick have to find them soon, not only is AJ the FBI's prime suspect, they are also on the hook for the first $10,000 of the insurance settlement.

Rick's former girlfriend asks him to find her missing husband and then she is arrested for his murder.

AJ poses as a student and Rick becomes a subject in a psychologist's experiment to investigate the death of a track star who died in a suspicious fall from a fraternity house roof.

When Rick's pestering drives AJ to take advantage of mom's offer to share the large suite she was given (instead of a small room) at a northern California resort, he cramps her style when he tries to prove that he witnessed a murder-that nobody will believe really happened.

In order to find a missing contractor, the Simons have to search a nudist colony.

A restuarant critic is killed, and his partner hires Rick and AJ to find out why and by whom.

A threatened bridegroom begs for help a few days before the wedding, who doesn't want the bridegroom to get married?

The MC of a family style tv quiz show is worried that the show might be rigged and asks the Simons to investigate, which they do by becoming contestants.

AJ and Rick dig up a time capsule for their mother's high school reunion and get a surprise when they find things connecting her former classmate to a long ago murder.

Downtown plans to propose to Temple, but they disagree about an arrest. Downtown thinks the arrested man is a criminal and Temple thinks he is the victim of a plot to evict him from his home.

Janet returns with amnesia and involved in some serious trouble. The brothers work hard to discover what happened to the last four years and to save her.