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.

When Paul falls hopelessly in love with novelist Nicole Longet (Claudine Longet), he flees, but she interprets his action to mean that he is a spy colleague of Mike Allen (Stephen McNally) until the agent reveals Paul's secret.

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's college friend Mark Shepard (Bobby Darin) gets him to help out in his tourist business on the Riviera, and they become involved with smugglers when they earn a sports car for assisting May Huston (Eve Arden) and her daughter Marcia (Davey Davison).

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.

Paul's old friend Clara Mallory (Jan Sterling), whose hands are disabled, becomes interested in the treatment of Belle Frazer (Kathryn Hays) by Dr. Raphael (Murray Hamilton) a supposed quack.

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.

When Paul makes a satirical toast behind the Iron Curtain, racing-car driver Janos Takacs (Eric Braeden) courteously joins in and finds himself in prison. Paul tries to make up for his frivolous action by freeing him with the help of his sister Marika Takacs (Gia Scala) and former prisoner Istvan Zabor (Telly Savalas).

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.

When April Martin (Carol Lynley) vanishes shortly after Paul meets her in New Orleans, he goes on a complex search that leads him to a surprising solution to the mystery of her disappearance and a threat to her life.

In Mexico, Paul vies with charmer and con man Ramon de Vega (Fernando Lamas) for the affections of the wealthy Jessica Braden (Tippi Hedren).

An old friend of Paul's is on the run, suspected of murdering his lover's husband, and Paul returns to his home town to investigate the case.

Stranded in the middle of nowhere, Paul hops a freight and becomes companion of the enigmatic Brett (Robert Drivas) on a trek full of symbolism.

In Monte Carlo Paul has to come to the rescue of gigolo Ramon de Vega (Fernando Lamas) when “sparrow” Charlotte Hyde (Gena Rowlands) doesn't turn out as he bargained.

When Paul makes a satirical toast behind the Iron Curtain, racing-car driver Janos Takacs (Eric Braeden) courteously joins in and finds himself in prison. Paul tries to make up for his frivolous action by freeing him with the help of his sister Marika Takacs (Gia Scala) and former prisoner Istvan Zabor (Telly Savalas).

Paul successfully defends Louise Brode (Dana Wynter) on a charge of murdering her husband when her regular lawyer, Martin Shawe (Keith Andes), is injured, but Paul suspects Shawe's tactics, and feels compromised.

Paul is in Rio de Janeiro trying to trick Larry Carter (Peter Lawford) into returning to the US to face trial when Molly Pierce (Anne Helm), daughter of his victim, makes an attempt on the murderer's life.

After a brief romance with Laura Beaumont (Katherine Ross, Paul is guest of her father Phil (Stephen McNally) at an exclusive ski resort where an avalanche provides the setting for a cunning card game to defeat the evil dictator General Carlos Portaz (Robert Loggia), the new object of Laura's affection.

Judy Collins (Jill Haworth) transports money for mobsters, but when she calls on Paul's assistance after $200,000 disappears, casino owner Angie Zeno (Harold J. Stone) goes after him, causing Paul to try a daring ploy.

On their sail-planing vacation Paul remains in the dark about the actions of secret Israeli agent Lisa Sorrow (Ina Balin) as she tracks down a Nazi war criminal In the Arizona desert .