Barnaby Jones is a television detective series starring Buddy Ebsen and Lee Meriwether as father and daughter-in-law, who are also both private investigators in Los Angeles, which ran on CBS from January 28, 1973 to April 3, 1980, as a midseason replacement, which bumped the long-running detective series Mannix to air, one hour before this one.

The Barnaby Jones character was introduced in the third-season Cannon episode "Requiem for a Son" in 1973. The two-part episode "The Deadly Conspiracy" (1975) began on Cannon and concluded on Barnaby Jones.

When Barnaby Jones (Buddy Ebsen) had worked as a private eye for many years, he decided to retire, leaving the business to his son Hal. When Hal was murdered, while working on a case, Barnaby came out of retirement to find his son's killer. His widowed daughter-in-law and faithful partner, Betty Jones (Lee Meriwether) had joined forces with her father-in-law in solving all the cases. The two also decided that they worked together so well, that they continued to keep the detective agency open. Jones was unusual, because counter to the stereotypical detective, he was a non-drinker, ordering and drinking milk in restaurants and bars.