Paul is no longer aware of his diagnosis after a tobogganing accident brings on amnesia, so he returns to his fiancée Kate Pierce (Carol Lawrence) in San Francisco to help him with the mystery of six missing months in his life.

As prime suspect in the murder of his sailing companion, Paul is held on the island of Bonaire while the real murderer is exposed by an old friend as three people from the same Arkansas city meet there.

Paul's old friend Duke Smith (Sugar Ray Robinson) goes into a championship prize fight knowing he might collapse, so he places a bet against himself in Paul's name, leaving him to sort out the aftermath.

Paul experiences friendliness turning to malice when he is oppressed with demands from all sides after winning a fortune in the sweepstakes.

Paul tries to protect Diana Hays (Diana Hyland) from her eccentric husband Julian Hays (Jack Palance) who was convicted of her murder when she mysteriously disappeared.

Gigolo Ramon De Vega (Fernando Lamas) falls for fortune hunter Diana Murrow (Joan Hackett) at a posh Mexican resort.

Paul is flying to San Francisco to spend Christmas with his former fiancee, but gets stranded when his plane makes an emergency landing. And he ends up spending Christmas Eve with Harry Martin (Ernest Borgnine), a garrulous cabdriver estranged from his family and laughing his way through a lonely life.

Traveling by bus across America Paul meets Tina (Kim Darby), a runaway teenager who alternately threatens him, then pleads with him to take her to Los Angeles.

Paul tries to solve the mystery of payments his friend Jim Carlson (Peter Greaves) is making that have led his wife Ellen (Delphi Lawrence) to turn to alcohol over fear of another woman.

A surprising encounter on the road brings Nicole Longet (Claudine Longet) back into Paul's life, complications in hers hindering their fragile attempts to let their love blossom again.

Susan Sinclair (Brooke Bundy), daughter of former San Francisco mayor Dwight Sinclair (Wendell Corey) has been addicted to drugs by Las Vegas mafia boss Carl Cappi (Edward Asner), and Paul uses the threat of a committee to amend the US Constitution to thwart him.

Paul finds himself in deep trouble when he is mistaken for his old friend Harry Bevins (Jack Kelly) who is playing both ends against the middle in Tokyo.

Paul becomes involved in a dangerous Yugoslavian adventure, seeking hidden diamonds and documents when Gillian Wales (Joan Collins) mistakes him for an underworld character.

When Vince Murdoch (Aldo Ray) rescues Paul from an assault by teenagers, the discredited policeman must then rely on him as his witness on a murder charge, and then the teenagers too..

After fleeing a North Vietnamese prison camp, Paul's flying buddy from the Korean War, Colonel Mike Green (Martin Milner) escapes from a military hospital, believing he's still being pursued by the Viet Cong.

There is a murder mystery to solve after Dena Fuller (Elizabeth Ashley) ends her ski romance with Johnny Cadell (Tom Simcox), and sails back to the US with Paul, finding Johnny's unpleasant brother Charles (Skip Homeier) on board - and his wife dead when they arrive in New York.

Thoughts of his life as a Korean War airman - and a woman he once loved - come flooding back to Paul when he arrives at a Tokyo bar for a reunion with his flying comrades after 15 years.

Though only a pawn for the real thieves, Paul is suspected of stealing jewels worth many millions from wealthy financier Erich Krieger (Helmut Dantine).

A friend from school days, Alice McKenna (Geraldine Brooks) causes talk in Paul's home town when she asks him to clear her name after serving seven years for murdering her husband

When rebels in a breakaway Himalayan state hold Paul and two American women as espionage suspects, he finds himself the object of one's special plan for his immortality.

Karen Mueller (Barbara Stanek) claims to be the illegitimate daughter of Paul's friend Spencer Holt (John Forsythe), and her appearance at the very end of his Gubernatorial campaign presents the candidate with a difficult choice.

Just before a government assault Paul aids Abby Powers (Katherine Crawford) to reach a Latin American rebel camp where her father is writing about the leader.

In Albania to act as counsel for accused spy Brad Capo (Mike Roads), Paul is housed with American defector Dave Corbett (Ossie Davis), and faced with conflicting instructions that could mean freedom or death.

Paul's court martial defence of the man who helped him escape from Albania, ends up resting on a point of moral philosophy.

Paul is taken hostage by escaped convict J.B. Flowers (Burr DeBenning) who flees from a posse led by Sheriff Hoag (Slim Pickens).