Frank Cannon (William Conrad) and Jones find themselves in the middle of an international conspiracy which threatens their lives .
Barnaby seeks the culprit behind a campaign of terror directed at an actress (Anne Francis).
A former mental patient (Kristoffer Tabori) is suspected in a murder similar to one he once committed.
A woman suspects her photographer fiance's death is linked to a murder story; guest John Ritter.
A bride stuns her groom, a newspaper editor, by fleeing the reception after seeing her own photograph.
Barnaby heads an independent probe of two deaths resulting from fierce competition within a firm.
A father asks Barnaby to clear his daughter's reputation after she dies from a drug overdose.
An insurance company sends Barnaby to investigate the death of a honeymooning hotel owner.
A murder witness says she was listening to a talk-show host (Larry Hagman) just before the crime.
Barnaby must determine if the dog that killed a boy's stepfather was attack-trained; guest Ina Balin.
After learning she was adopted, an heiress seeks her biological mother; guest Eileen Brennan.
A woman ingratiates herself with high-society horse lovers to set up burglaries for her beau.
Barnaby uncovers bigamy, blackmail and murder when he seeks a missing family man; guest Stephen Collins.
An art collector's death disrupts the forgery plans of his wife (Donna Mills) and her lover.
A coach seeks to avert a scandal after an Olympic swimming hopeful dies mysteriously; guest Pat Hingle.
A con artist must kill when a former victim appears unexpectedly.
A desperate man (Barry Brown) holds Betty hostage to force Barnaby to reopen his brother's case.
Barnaby probes the mob-style murders of an ex-gangster and an author who were collaborating on a book.
Barnaby seeks a gang member who thinks he caused a wealthy man's death.
Betty doubts a friend's (Gary Collins) innocence when evidence implicates him in murder.
Barnaby seeks a witness (Gary Lockwood) who could clear his client of a bank employee's death.
Inconsistencies in a surfer's death put Barnaby on a killer's trail; guests Joanna Miles, Jeff Conaway.
A sheriff (Clu Gulager) interferes with Barnaby's efforts to clear a mentally impaired youth of murder.
Barnaby poses as an eccentric adventurer to investigate murder attempts on a millionaire (Denver Pyle).