Goofs

Columbo spots a couple of ice cream sodas left on the counter in Alex Bradey's office, known as his "boys' club". One glass is almost full, and the other about half-full. Not only can the viewer see this, but Columbo comments on it at length, theorizing with uncanny accuracy how the full and the half-full glasses show what happened earlier, when the victim (Fisher) was visiting Bradey's office. The moment Columbo leaves, Bradey rushes to the soda glasses to destroy the evidence. Inexplicably, both glasses are now nearly empty.

When Columbo is eating at the commissary and overhears the conversation between the two actresses, he puts ketchup on his food. When the camera switches to a two-shot of the actresses, the ketchup bottle is sitting on the counter in front of them.

When Columbo tells him the victim is his friend Lenny, Alex puts his glasses up to his forehead. He later moves the glasses back on his nose, but in the next shot, from behind, the glasses are still on his forehead.

As Bradey and Fisher are talking in the studio, Fisher walks over to the jukebox set against a wall. Meanwhile, Bradey is standing in the middle of the room. Fisher says, "I jumped ship when I saw you." The scene cuts, and both men are now seen standing in the middle of the room. No time has elapsed to show either man moving.

(at around 1h 14 mins) When Columbo talks to Alex Bradey on the crane from inside his car, he first holds his cigar on the left hand outside the car. In the next shot, the cigar is in his right hand inside the car near the steering wheel. A moment later, he holds the cigar again in his left hand outside the window.