Jim Henson’s The Cube traps a man in reality

Jim Henson’s 1969 teleplay The Cube, a 53-minute bottle film produced for NBC’s Experiment in Television, aired twice and remains relatively obscure. Set inside a white cube with no windows or door, the story escalates through “invisible doors,” shifting furni

A man wakes up in a white cube in 1969—and the room refuses to cooperate.

There are no windows, no door, just walls of white panels. He doesn’t know where he is or how he got there. The rules appear simple at first: someone opens part of the wall. brings in a stool. and the man settles into a fragile new normal—until the section is shut behind him and he can’t open it back up.

This is the start of Jim Henson’s The Cube. a 53-minute bottle film produced for an NBC anthology series called Experiment in Television. It’s also where the story’s real tension begins: a “door” that works for everyone else. but not for him. After that, dozens of people take turns entering and leaving through various invisible doors in the cube.

The interactions start with odd details that land like wrong notes. Strawberry jam sits on the stool. A woman claims to be the protagonist’s wife even though he doesn’t recognize her. The unsettling pace doesn’t slow—it escalates. As people deliver supplies. harass him. and even attempt to seduce him. the nature of reality starts to feel less like a question and more like a collapsing floor.

Then the room itself begins to change. Beds and couches appear. Fully stocked liquor cabinets show up. Furniture that shouldn’t be there simply arrives. A full band slips in and sings a line—“you’ll never get out ‘til you’re dead”—before it becomes clear the performance is trapped in a faulty loop. The record skips repeatedly on the word “dead,” stretching the threat into something mechanical.

Henson’s presence lingers in the strangest places. The Cube includes an uncredited cameo by Jim Henson himself as the voice of a gorilla in a tutu.

For all the motion—people coming in. objects appearing. songs replaying—The Cube keeps its grip by refusing to explain itself. The teleplay offers many questions but no answers: Is the man living in a simulation?. Is he on TV?. Are the people around him actors?. Is any of it real at all?. Does matter exist?.

It’s a feeling that still lands today. more akin to the modern dystopian anthology series Black Mirror than anything else—even as the story predates it. The Cube isn’t true lost media, but it has stayed curiously out of reach. It only aired twice. A sold-out DVD listing exists on Amazon. And it only occasionally makes an appearance on streaming services in any official capacity.

If you’re trying to watch it now, your best options are two YouTube uploads. One is a much higher-quality transfer of a black-and-white kinescope film with remastered audio. but it cuts out most of the song due to copyright. The other is full color and retains the song, but it’s a lower-quality rip with muddier image and audio.

Either way, the experience matches the premise: a tight room that keeps reshaping itself while telling the viewer to keep asking what’s real. And for 53 minutes, the man inside the cube can’t do anything about it.

Jim Henson The Cube Experiment in Television NBC bottle film Black Mirror kinescope anthology cult TV 1969 teleplay