A U.S. intelligence operative, posing as a jazz musician, has been captured behind the Iron Curtain. In his possession is a new micro circuit hidden in one of several sugar cubes soaked in ... See full summary »



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Episode cast overview:
Senko Brobin
Jack Denbo ...
Deane (as Jacques Denbeaux)
The Doctor
Max Kleven ...
The Attendant
Joyce Easton ...
The Clerk


A U.S. intelligence operative, posing as a jazz musician, has been captured behind the Iron Curtain. In his possession is a new micro circuit hidden in one of several sugar cubes soaked in psychedelic drugs. Briggs devises a plan where Rollin will be arrested and put in the same prison. To execute the plan, Rollin will need to shed a strait jacket and inject the arrested intelligence agent with a drug making it appear he has died. Barney, Willy and Cinammon will also play key roles in the IMF leader's plan. Written by Bill Koenig

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TV-PG | See all certifications »




Release Date:

1 April 1967 (USA)  »

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Technical Specs


| (168 episodes)

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Aspect Ratio:

1.33 : 1
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Did You Know?


The set for "The Happening" nightclub is a redressed version of the same set where Spock is attacked in Star Trek: Operation - Annihilate! (1967). Both shows were filmed at Desilu (Paramount) around the same time and both aired in April 1967. See more »


When Barney is inside the crematorium, the back wall of "bricks" are quite obviously drawn onto the wall, as the lines don't match up with the missing bricks. When the wall is replaced and the body brought in, the wall appears intact (the brick lines match up). When Barney starts to kick the replaced bricks, the wall around it now appears smooth (instead of individual bricks). As he gets up and shifts the body through the hole, the wall again appears to be all bricks (not smooth) with the lines again not matching up to the missing bricks. See more »


[first lines]
The Clerk: May I help you, sir?
Daniel Briggs: Yes, I'm looking for a Chateau Delacroix, 1959.
The Clerk: Oh, that's very difficult. We have an excellent Delacroix '57.
Daniel Briggs: I'd prefer '59. It's far superior.
The Clerk: Let me look in the back room. In the meantime you might find this an interesting wine.
Daniel Briggs: Thank you.
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User Reviews

Good but very, very poorly timed.
7 February 2014 | by (Bradenton, Florida) – See all my reviews

"A Cube of Sugar" is a good episode of "Mission: Impossible" but it also has to be among the most poorly timed. Only one episode earlier, there was a mission that was incredibly similar--too similar. It's really odd that they didn't play these are very different dates. Both have guys held hostage in a mental hospital and they are given mind-altering drugs in order to break the prisoners! The big difference is that in "Shock" it's the IM Force doing the drugs (along with shock treatment) but in "A Cube of Sugar" it's an enemy government that is trying to break someone.

A US agent, posing as a jazz musician, has been caught and is being held in a psychiatric-like facility and is being tormented to get him to talk. What the enemy doesn't know is that one of the sugar cubes they've found on him is NOT laced with LSD but contains an important microcircuit! So the plan is to get Rollin into the same facility and then have this magician slip out of his straight jacket and inject the prisoner with a drug that makes him appear dead--so his 'grieving widow' (Cinnamon) can claim the body and help him to escape.

As I said above, it's a good episode. Just DON'T watch it right after seeing "Shock" or it will most likely tick you off or bore you because "A Cube of Sugar" is essentially a reworking of the same story--and one that isn't as good as well.

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