Throughout the show Nurse Bianchi wears her hair with it combed from the left to the right. When she arrives at her apartment and finds Kimble waiting for her, her hair is as it has been but as soon as she walks through the door into the apartment her hair is suddenly very different, with it combed from right to left and pulled back toward the back of her head in a completely different style. This is the only scene where her hair would look like this as it would be back to the usual way during the rest of the show.
The California warehouse where the one-armed man works (seen in an establishing shot) is the exact same warehouse seen three weeks earlier in Second Sight (1966), which was set in Pittsburgh.
There is no gap between the hallway floors outside the elevator, and the floor of the elevator car. The "elevators" are obviously just closet-sized rooms on a set, with a door mechanism put in front of it.
When Kimble sees the one armed man at the scene of the fire he is with Maggie Tibbett and she is wearing a pail green dress. Maggie is in that same dress when she is hit by the truck and taken to the hospital. Maggie has no outside visitors other than police and hospital staff. Yet when she is discharging from the hospital she is wearing a dress of a completely different shade and she is carrying a suitcase. Obviously she didn't have a suitcase when she entered the hospital.
The beginning of Acts 2, 3 and 4 all show the hospital parking lot. At the beginning of Act 2, a light blue Mustang can be seen pulling into a parking space. At the beginning of Act 3, the same Mustang is seen just pulling into the lot. At the beginning of Act 4, the same Mustang is again seen pulling into the same parking space.
Maggie had a significant wound to her neck, but when talking to the nurse as she was leaving the hospital, there is no bandage, no scar, and not a single mark on her neck.