Visible crew/equipment: After Lampkin tells his buddies to deal him into the poker game and how they'll clean out Diamond H cattle, when it cuts to the Maria and Charlie doing dishes, there is something at the left side of the screen that moves with the camera, which should not be seen onscreen (widescreen version).
Visible crew/equipment: After Wonder Woman cautions JP about Lampkin, when JP tells the kids about Maria's apple pie note the open cabinet door over JP's shoulder, presumably to prevent reflections. After Jeff admits to being Lampkin's informer, when JP walks over to Jeff that cabinet door is closed and now we can see the reflections of array lighting/equipment (then when WW walks over both doors are ajar).
Visible crew/equipment: After the children rescue Wonder Woman it cuts to her telling JP and Jeff about it, and when JP tells the kids about Maria's hot apple pie, the actor's tape mark is visible on the rug where Charlie had been standing.
Visible crew/equipment: After Steve finds out the truth about Lampkin, while the Deputy chases Steve in the jeep we can see a bit of the back end of the filming vehicle in one of the shots facing Steve, at the bottom left side of the screen (widescreen version).
Visible crew/equipment: When Wonder Woman is in the kitchen with the children telling them they should take care of themselves, a crew member's back is visible at the left side of the screen.
Visible crew/equipment: After Steve climbs out of the hole he was trapped in he thanks Charlie, and just as Steve asks Wonder Woman about being in Texas we can see the boom arm (not the mic) moving around at the top left corner of the screen (fullscreen version).
Visible crew/equipment: When Wonder Woman arrives at the Diamond H ranch and is introduced to Charlie, just as she kneels down in front of the young boy, the shadow of the boom mic is moving at the top left corner of the screen (widescreen version).
Visible crew/equipment: When Wonder Woman arrives at the Diamond H ranch, the housekeeper opens the front door and the reflection of lighting/equipment is visible on the glass. Additionally, there's a prominent flagpole at the front of the house with the Flag of Texas flying high, but the problem is it's being flown upside-down with the red stripe at the top, when it should be the white stripe at the top. Proud Texan JP Hadley would know better.
Visible crew/equipment: While JP checks the kids before their breakfast he tells them they could all use more elbow grease behind their ears, and as the camera pulls back the shadow of the boom mic is moving on the wall, at the right side of the screen (widescreen version).
Wonder Woman in Hollywood - S1-E14
Visible crew/equipment: When Wonder Woman and Wonder Girl find Bremer's hold on stage 12, just as they walk inside Bremer's fake stateroom their two T-marks are visible on the floor, under the table.
Wonder Woman in Hollywood - S1-E14
Visible crew/equipment: When Drusilla spins into Wonder Girl at the coffee shop, in the next shot as she says, "Excuse me," the actor's T-mark is visible on the floor where she stands.
The Return of Wonder Woman - S2-E1
Visible crew/equipment: While the jet is flying over the Bermuda Triangle the steward releases the gas into the air, and when Steve rushes toward him in the wideshot we can see a crew member wearing jeans and a blue shirt, at the right side of the screen.
Visible crew/equipment: When Joe Atkinson walks into Steve's office and comments that during WWII he "was wrapped in a cloak and carrying a dagger for the OSS," in the next shot the shadow of the boom mic is moving on the wall, at the top right corner of the screen.
Visible crew/equipment: When the hit-man is loading his gun in the alley in preparation to kill Diana, a crew member is reflected in the storefront "Humburgers" window.
Visible crew/equipment: After Wonder Woman rescues Nadia's boyfriend by tossing the two bad guys off screen, you can see the shadow of a stage hand adjusting a prop of some kind. This can be seen directly behind Wonder Woman as she's grabbing the rope to go and tie the two bad guys together.
Answer: There is no logical reason. Any normal person would notice these type of absences. The show employs a "suspension of disbelief," which is a literary device where the movie audience or a book reader accepts that certain things are unreal for the sake of the story to be told. It is similar to no-one noticing that Clark Kent looks exactly like Superman because he wears glasses.
raywest ★