Barnaby Jones
The Deadly Conspiracy
TV Flash files “The Deadly Conspiracy” as a desk essential hour — Barnaby Jones (1973–1980) on CBS, season 4, episode 1, aired 1975-09-19, 60 min.
From the desk
How this hour is filed
This leaf is S04E01: listed hour 62 of 178 in the Barnaby Jones guide, first listed hour of season 4. It aired 1975-09-19 (60 min). The listed hour before it is “Bond of Fear” (S03E24). Next is “Theater of Fear” (S04E02).
Essential hour: “The Deadly Conspiracy”. The Deadly Conspiracy is mid-run Quinn Martin language. Barnaby still solving with patience: the home lab as the gadget, the overalls permanently off, the trench the whole brand.

Catalog log
Broadcast listing — not a TV Flash recap.
Direct continuation on "Cannon" (S05E02) episode titled "The Deadly Conspiracy". Since there were two versions of the story, one where it ends on "Cannon" as a single episode, this "Barnaby Jones" episode is a continuation on the two-part cross-over story.
Viewer FAQ
Where does The Deadly Conspiracy sit in the Barnaby Jones guide?
S04E01 is listed hour 62 of 178 — first listed hour of season 4, season 4 episode 1.
When did Barnaby Jones S04E01 air?
The Deadly Conspiracy aired 1975-09-19 and is listed at 60 minutes.
Do I need The Beverly Hillbillies first?
No. Ebsen's Clampett fame is the career footnote. This is a Quinn Martin PI hour with a home lab, not a rural-comedy reunion.
In the series
Why this series still plays
Buddy Ebsen clocks out of Jed Clampett overalls and into a PI trench with a home lab. An older lead in a youth-drunk decade, solving murders with patience instead of karate. Second-act star power: gray hair owning a Quinn Martin hour without pretending to be thirty.
Requiem for a Son names the origin as grief: a retired private investigator returns to the game after his son's murder, and Buddy Ebsen clocks out of Jed Clampett overalls into a Quinn Martin trench with a home lab. CBS's Barnaby Jones (1973–1980), from Edward Hume, ran eight seasons, 178 episodes of steady crime. Lee Meriwether's Betty Jones, Mark Shera's J.R., and John Carter's Lt. Biddle filled the office. Ebsen was in his sixties as a leading man — rare in a youth-obsessed decade — and often crossed over with…
Filed against
- Buddy Ebsen as Barnaby Jones
Buddy Ebsen’s Jed Clampett struck oil and moved The Beverly Hillbillies into a ratings weapon — 1960s catalog rube-versus-elites, then Barnaby Jones clocking out of overalls into a PI trench with a home lab. TV Flash files him as the…
- Lee Meriwether as Betty Jones
Lee Meriwether's Betty Jones kept Barnaby Jones in the lab and the living room — Buddy Ebsen clocking out of overalls into a PI trench, an older lead in a youth-drunk decade, murders solved with patience instead of karate. TV Flash files…
- Mark Shera as J.R. Jones
Mark Shera’s J.R. Jones partnered Buddy Ebsen’s second-act PI trench on Barnaby Jones — home lab, patience instead of karate — then hit S.W.A.T.’s helmet-and-van gloss. An older-lead Quinn Martin hour; disco-era tactical acronym…
- John Carter as Lt. John Biddle
John Carter’s Lt. John Biddle backed Barnaby Jones as Quinn Martin hour muscle — Buddy Ebsen clocking out of Jed Clampett overalls into a PI trench with a home lab. An older lead in a youth-drunk decade, murders solved with patience…