It was one of those late-night talk show appearances in the late eighties, the kind where the host is leaning in with genuine curiosity and the audience is filled with people who grew up watching reruns after school.

Werner Klemperer sat there, looking nothing like the bumbling Colonel Klink. He was elegant, soft-spoken, and possessed a sharp, intellectual wit that always surprised people who expected the man from Stalag 13.

The host asked the usual questions about his music and his father, the great conductor Otto Klemperer. But then, a woman in the third row raised her hand during the Q&A segment.

She didn’t want to know about the opera or his time in the army. She wanted to know about the monocle. She asked if it was glued to his face or if there was some secret wire keeping it attached to his eye during those frantic scenes with Hogan.

Werner smiled, that same sly grin that used to drive Bob Crane’s character crazy, and he started to laugh. He adjusted his glasses and leaned forward, his voice dropping into that familiar, slightly gravelly tone.

He explained that there was no glue and no wires. It was all muscle tension, a trick he had perfected so well that he could practically sleep with the thing in his eye.

But then his expression changed. He remembered a specific Tuesday morning on the set in 1967. It was a day when the California heat was baking the soundstage and everyone was a little on edge.

They were filming a high-stakes scene where Klink was supposed to be at his most menacing, staring down John Banner’s Sergeant Schultz. The script called for Klink to be absolutely livid.

He had to lean in close, inches from Schultz’s face, and scream about the Russian front. Werner had spent the morning practicing his most intense, bulging-eyed glare.

He wanted the monocle to look like it was under immense pressure, just like the Colonel himself. John Banner stood there in his heavy wool uniform, sweating and trying to keep a straight face.

The cameras were rolling, the lighting was perfect, and the tension in the room was palpable. Werner took a deep breath, leaned in until he could smell the apple strudel John had eaten for lunch, and prepared to deliver his most terrifying line.

And that’s when it happened.

The monocle didn’t just fall. It launched.

Because of the sweat on Werner’s brow and the sheer intensity of his facial contortion, the glass disc popped out of his eye socket with the velocity of a small projectile.

It flew through the air, glinting under the hot studio lights like a tiny, round UFO, before descending in a perfect, shimmering arc.

It landed with a sickeningly clear “clink” right into the middle of the prop cup of lukewarm coffee that John Banner was holding.

The sound was tiny, but in the absolute silence of a rolling take, it sounded like a cannonball hitting a pond. A small plume of brown liquid splashed up, speckling John Banner’s pristine uniform and even dotting the tip of his nose.

For a second, the entire world stopped.

Werner stood there, one eye squinting involuntarily as if he were still trying to hold onto a ghost, his face frozen in a mask of Nazi fury that was rapidly melting into sheer embarrassment.

He was still inches away from Banner’s face, but the terrifying Colonel Klink had vanished, replaced by a man who had just shot his own eyewear into his co-star’s drink.

John Banner, ever the professional, didn’t move a muscle at first. He stood there like a mountain of wool, his eyes wide, looking down at the cup in his hand where the monocle was slowly sinking toward the bottom.

You could see the internal struggle playing out across his features. His cheeks began to puff out. His chest started to heave. He was trying to maintain the “I see nothing” persona, but the absurdity of the situation was winning the war.

Then, the sound started. It was a low, rumbling wheeze deep in Banner’s chest. It sounded like a teakettle starting to boil.

Werner, seeing his partner about to explode, broke first. He let out a sharp, barking laugh that echoed through the rafters of the soundstage.

That was the signal. The dam broke. John Banner let out a roar of laughter that was so loud it probably shook the neighboring sets.

He was laughing so hard he actually had to set the cup down on a nearby table because he was shaking the coffee—and the monocle—all over the floor.

The director, who had been watching the monitors with a look of intense concentration, simply buried his face in his hands. He didn’t even yell “cut” for a good ten seconds because he was too busy shaking with silent laughter.

The cameramen were leaning against their rigs, and the script supervisor was doubled over. Werner recalled that they spent the next twenty minutes trying to recover their composure.

Every time they looked at each other, the laughter would start all over again. John Banner kept pointing at the cup and saying, in that thick accent, “Werner, I think you dropped something in my breakfast!”

The prop master had to be called in to fish the monocle out with a pair of tweezers because it had wedged itself at a strange angle in the bottom of the mug.

They had to dry it off, clean the coffee stains, and then wait for the wardrobe department to frantically dab the brown spots off of Banner’s heavy jacket.

But the funniest part, Werner told the audience, was that the more they tried to be serious for the next take, the more ridiculous it felt.

He realized in that moment that the monocle was more than just a prop; it was a barometer for Klink’s sanity. If he pushed the character too far into genuine anger, the costume literally rejected him.

He explained to the interviewer that he and John Banner shared a very specific bond. Both were Jewish men who had fled the actual Nazi regime, and here they were, dressed in the uniforms of their former oppressors, making the world laugh at them.

That accidental monocle-launch into the coffee was a moment of pure, unintentional slapstick that reminded them both why they were doing the show.

They weren’t there to be scary. They were there to make these figures look as ridiculous as possible. And nothing makes a high-ranking officer look more ridiculous than losing his dignity to a three-centimeter piece of glass and a beverage.

By the time they finally got a clean take, the sun was starting to go down and the crew was exhausted from laughing.

Werner said he never looked at a cup of coffee on set the same way again. He always kept a respectful distance, just in case his face decided to fire another shot across the bow.

The audience at the talk show was in stitches by the end of the story. Werner sat back, a look of genuine affection in his eyes as he thought about his late friend John Banner.

He remarked that those moments of chaos were the ones that truly made the show live for the cast. It wasn’t the scripts or the clever plots; it was the fact that beneath the uniforms, they were just a group of friends waiting for the next piece of equipment to fail.

It was a reminder that even in a show set in a prisoner-of-war camp, the greatest weapon they had was the ability to find the humor in the mistakes.

He ended the story by saying that he still had one of the original monocles at home, kept safely in a velvet box, far away from any liquids.

There is a certain magic in a mistake that manages to capture the heart of a character better than any director ever could.

Do you think you could have kept a straight face while watching Colonel Klink’s monocle go for a swim?