A blind amnesiac (Belinda Montgomery) holds the only clue to a woman's disappearance.
Barnaby believes a jewel theft is connected to a circus performer's fatal leap from an office building.
Barnaby clears a resort owner (Wayne Rogers) of murder then doubts the evidence.
Barnaby probes a rancher's death and winds up trapped in a mine with rattlesnakes.
A race driver (Clu Gulager) kills his brother-in-law to prevent him from revealing infidelites; guest Margot Kidder.
A private investigator's widow hires Barnaby after her husband dies while on a murder case.
A man (Glenn Corbett) shoots the hired killer of his wife, then is blackmailed by the assassin's widow.
A merchant seaman involved in the disappearance of a Cambodian emerald dies.
A husband thinks he killed his wife's (Lynda Day George) lover but learns the wrong man died.
An attorney dies in a car crash after seeing his wife's ghost.
Betty poses as the girlfriend of an attorney who defended a jewel thief, then killed him for his loot.
The investigation of an executive's death in an airplane crash yields three suspects.
Barnaby's probe of a motorcyclist's death leads to a reclusive businessman and the mob; guest Patrick O'Neal.
The stormy relationship between a feminist and a writer ends with the death of the author's wife.
The trail of a killer stalking a rich girl's suitors leads to a wheelchair-bound ex-boyfriend; guests Ida Lupino, Meredith Baxter.
A jewelry dealer (Gary Lockwood) schemes to steal $500,000 in platinum from his own company.
Unaware she is the killer's alibi, a girl hires Barnaby to investigate her father's death.
Barnaby pursues a rock singer (Marjoe Gortner) for a songwriter's murder.
Betty asks Barnaby to investigate her college roommate's death, which police list as suicide.
Barnaby enters a Latin American power struggle when he searches for a mysterious client's son.
A stockbroker's widow becomes the second victim of her husband's killers (David Wayne, Eileen Heckart).
A woman impersonates a businessman's dead wife to collect a hefty divorce settlement; guest Susan Clark.
Barnaby seeks to foil a con man (Bradford Dillman) who impersonates wealthy men and weds rich women.
The small-time gambler Barnaby seeks is related to a promising pro basketball player with a questionable past.