Columbo (1971–2003)
30 user 6 critic

The Conspirators 

An IRA terrorist executes an arms dealer he considers traitorous; Lt. Columbo is on the case.


Leo Penn


Howard Berk, Pat Robison (based on an idea by) | 2 more credits »




Episode cast overview, first billed only:
Peter Falk ... Columbo
Clive Revill ... Joe Devlin
Jeanette Nolan ... Kate O'Connell
Bernard Behrens ... George O'Connell
Michael Horton ... Kerry Malone
Albert Paulsen ... Vincent Pauley
L.Q. Jones ... Gun Dealer
Deborah White ... Angela
Sean McClory ... Captain (as Seán McClory)
Michael Prince Michael Prince ... Michael Moore
Donn Whyte Donn Whyte ... Leach
Johnny Silver ... Tow Truck Driver
Carole Hemingway Carole Hemingway ... Self (as Carole Hemmingway)
Tony Giorgio ... Harry
John McCann ... Brandon


Devlin is an Irishman. In his youth he was a terrorist but now he is a famous writer and, officially, a supporter of an American society proposing to help the victims of terrorism. Actually he is buying from Pauley weapons for the terrorists. Devlin kills him because he thinks he has been betrayed. Lt. Columbo is responsible for the inquiry and becomes friendly with Devlin, but it is very dangerous to be familiar with Lt. Columbo when you are a murderer. Written by Baldinotto da Pistoia / corrected by statmanjeff

Plot Summary | Add Synopsis


TV-PG | See all certifications »

Did You Know?


The only episode that covers the I.R.A. See more »


When Columbo plays darts in the Irish pub, his first shot hits ABOVE the number 20. When he takes his second shot, the first dart now appears BELOW the number 20. On his third shot, the first dart is in it's original position ABOVE the number 20. See more »


Lt. Columbo: I couldn't resist trying your pinball machine. I guess I tried a little too hard, but that's an old problem with me, sir. The way I keep steering and pushing and pulling at things, someday the whole sky is gonna light up, and it's gonna say "tilt," and that's gonna be the end of the world.
See more »


References San Francisco (1936) See more »


God Save Ireland
Written by T. D. Sullivan
Melody: "Tramp! Tramp! Tramp! (The Prisoner's Hope)"
Written by George Frederick Root (as George F. Root)
See more »

User Reviews

This far and no farther
12 February 2014 | by stones78See all my reviews

This fine episode ended Columbo's initial run, and the best run at that, even though he came back in later years with some decent episodes, but it never matched the earlier years. This fairly original story has Columbo on the hunt for a rather flamboyant IRA terrorist named Joe Devlin, played superbly by Clive Revill, who isn't afraid to throw some whiskey down. Although Revill was only in this episode, his performance rivals Jack Cassidy, William Shatner, and Robert Culp, in terms of great guest stars who have memorable scenes with Columbo. My favorite episodes are when Columbo and the guest killer have a good rapport; regarding this segment, it's refreshing to watch the 2 men drink together in a bar, play darts, and share poems, even though Peter Falk probably overdoes it a bit considering this was to be the final episode. Look for another funny scene in a bookstore when Columbo's looking at a book on erotic art, and the way a woman watched him with suspicious eyes. The great Jeanette Nolan has a few scenes as Kate O'Connell, and also look for a familiar face in L.Q. Jones(Casino)as a slimy gun dealer. The scenery was especially a nice touch, which included a bar/pub, shipping dock and boats, and a huge mansion with an impressive ceiling. Even though I thought it was too easy and convenient the way Columbo deduces which ship would carry the guns, and how silly it was for Devlin to purposely leave a scratch mark on a whiskey bottle at the crime scene, this episode was a fine conclusion to a mostly great series that had many more ups than downs.

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English | Irish

Release Date:

13 May 1978 (USA) See more »

Also Known As:

"Columbo - Des sourires et des armes" (1978) See more »

Company Credits

Production Co:

Universal Television See more »
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Technical Specs



Sound Mix:



Color (Technicolor)

Aspect Ratio:

1.33 : 1
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