Just after the phony TV interview, Jim goes into the office and is sitting at the desk with Vorka and he's not wearing glasses. They then cut to a view from the camera hidden in the book and Jim has on black horned rimed glasses. Then back to the office scene and he's not wearing glasses, but puts them on later.
When Paris is applying makeup to Nora's face, he checks a photograph and then looks at Nora, who has two dark lines under her left eye. The camera cuts to a shot from behind Nora showing him using a brush on her, and when the camera cuts back to her face Paris is just applying the second line.
When Barnie is changing the glasses and clock during interview with Leo Vorka, he puts glasses on desk right side up, but when Vorka picks up the glasses to put them on, they are upside down.
Near the end of the episode, Vorka pulls out his gun and fires 6 shots at the "ghosts" but only 5 bullet holes can be seen in the wall.
The 'ghosts' are supposedly infrared projections. Infrared projections would not come in full RBG color. Further, the equipment needed to detect and translate infrared light to human-standard vision was much too bulky in the 1970s (and still is today) to be mounted in a pair of spectacles.
If Barney called the patrol car 22 on the government frequency pretending to be the dispatch, then the real dispatch must have heard this call as well. That alone would cause alarm in the secret police, the car 22 will be a suspect and all in its context (Paris as Zara and Willy) will be in a focus of a thorough inquisition, most likely revealing the whole scheme. Even if Barney's transmitter used so little power than only the car heard him, the driver's response would certainly be heard everywhere. It is not explained by the characters, how can one approach the antagonists' vehicle in that manner without these "side effects" which would alert everyone around.
The car 22, which was dispatched to transfer Stefan Zara from the prison to the Vorka's offices, is hijacked by IMF team, taken to the hideout where it waits for Paris to fit the mask, then arrives at destination with Paris as Zara. From the Vorka's and Kull's point of view that would be a suspiciously long journey and they are not concerned about it at all.
The team's plan was risky to the point of recklessness. If Vorka had simply taken off his glasses -- which are shown to be only cosmetic -- at any point during the 'visions,' he would have discovered the trick and exposed the mission. The same if he had noticed that Lisa's voice was coming from a single, small speaker on the mantle.
When Luther Adler is talking to Lisa's "ghost", he accidentally calls her Leah, then quickly corrects himself.